diff --git a/locales/index.d.ts b/locales/index.d.ts
index f7f952175f..3537d76840 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -8173,9 +8173,9 @@ export interface Locale extends ILocale {
          * 指定したユーザーのみに公開
          */
         "specifiedDescription": string;
-        /**
-         * 連合なし
-         */
+        "channel": string;
+        "channelDescription": string;
+        "channelSelected": string;
         "disableFederation": string;
         /**
          * 他サーバーへの配信を行いません
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 6c8a453023..c3e50c7146 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -2153,6 +2153,9 @@ _visibility:
   followersDescription: "自分のフォロワーのみに公開"
   specified: "ダイレクト"
   specifiedDescription: "指定したユーザーのみに公開"
+  channel: "チャンネル"
+  channelDescription: "選択したチャンネルに公開"
+  channelSelected: "選択中:{name}"
   disableFederation: "連合なし"
   disableFederationDescription: "他サーバーへの配信を行いません"
 
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 1e073a7de9..3df986c815 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -19,21 +19,21 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</button>
 		</div>
 		<div :class="$style.headerRight">
-			<template v-if="!(channel != null && fixed)">
-				<button v-if="channel == null" ref="visibilityButton" v-click-anime v-tooltip="i18n.ts.visibility" :class="['_button', $style.headerRightItem, $style.visibility]" @click="setVisibility">
-					<span v-if="visibility === 'public'"><i class="ti ti-world"></i></span>
-					<span v-if="visibility === 'home'"><i class="ti ti-home"></i></span>
-					<span v-if="visibility === 'followers'"><i class="ti ti-lock"></i></span>
-					<span v-if="visibility === 'specified'"><i class="ti ti-mail"></i></span>
-					<span :class="$style.headerRightButtonText">{{ i18n.ts._visibility[visibility] }}</span>
-				</button>
-				<button v-else class="_button" :class="[$style.headerRightItem, $style.visibility]" disabled>
+			<button ref="visibilityButton" v-click-anime v-tooltip="i18n.ts.visibility" :class="['_button', $style.headerRightItem, $style.visibility]" @click="setVisibility">
+				<template v-if="postChannel">
 					<span><i class="ti ti-device-tv"></i></span>
-					<span :class="$style.headerRightButtonText">{{ channel.name }}</span>
-				</button>
-			</template>
-			<button v-click-anime v-tooltip="i18n.ts._visibility.disableFederation" class="_button" :class="[$style.headerRightItem, { [$style.danger]: localOnly }]" :disabled="channel != null || visibility === 'specified'" @click="toggleLocalOnly">
-				<span v-if="!localOnly"><i class="ti ti-rocket"></i></span>
+					<span v-if="postChannel" :class="$style.headerRightButtonText">{{ postChannelName }}</span>
+				</template>
+				<template v-else>
+					<span v-if="actualVisibility === 'public'"><i class="ti ti-world"></i></span>
+					<span v-if="actualVisibility === 'home'"><i class="ti ti-home"></i></span>
+					<span v-if="actualVisibility === 'followers'"><i class="ti ti-lock"></i></span>
+					<span v-if="actualVisibility === 'specified'"><i class="ti ti-mail"></i></span>
+					<span :class="$style.headerRightButtonText">{{ i18n.ts._visibility[actualVisibility] }}</span>
+				</template>
+			</button>
+			<button v-click-anime v-tooltip="i18n.ts._visibility.disableFederation" class="_button" :class="[$style.headerRightItem, { [$style.danger]: actualLocalOnly }]" :disabled="postChannel != null || actualVisibility === 'specified'" @click="toggleLocalOnly">
+				<span v-if="!actualLocalOnly"><i class="ti ti-rocket"></i></span>
 				<span v-else><i class="ti ti-rocket-off"></i></span>
 			</button>
 			<button v-click-anime v-tooltip="i18n.ts.reactionAcceptance" class="_button" :class="[$style.headerRightItem, { [$style.danger]: reactionAcceptance === 'likeOnly' }]" @click="toggleReactionAcceptance">
@@ -54,7 +54,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<MkNoteSimple v-if="reply" :class="$style.targetNote" :note="reply"/>
 	<MkNoteSimple v-if="renote" :class="$style.targetNote" :note="renote"/>
 	<div v-if="quoteId" :class="$style.withQuote"><i class="ti ti-quote"></i> {{ i18n.ts.quoteAttached }}<button @click="quoteId = null"><i class="ti ti-x"></i></button></div>
-	<div v-if="visibility === 'specified'" :class="$style.toSpecified">
+	<div v-if="actualVisibility === 'specified'" :class="$style.toSpecified">
 		<span style="margin-right: 8px;">{{ i18n.ts.recipient }}</span>
 		<div :class="$style.visibleUsers">
 			<span v-for="u in visibleUsers" :key="u.id" :class="$style.visibleUser">
@@ -67,7 +67,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<MkInfo v-if="hasNotSpecifiedMentions" warn :class="$style.hasNotSpecifiedMentions">{{ i18n.ts.notSpecifiedMentionWarning }} - <button class="_textButton" @click="addMissingMention()">{{ i18n.ts.add }}</button></MkInfo>
 	<input v-show="useCw" ref="cwInputEl" v-model="cw" :class="$style.cw" :placeholder="i18n.ts.annotation" @keydown="onKeydown">
 	<div :class="[$style.textOuter, { [$style.withCw]: useCw }]">
-		<div v-if="channel" :class="$style.colorBar" :style="{ background: channel.color }"></div>
+		<div v-if="postChannel" :class="$style.colorBar" :style="{ background: postChannel.color }"></div>
 		<textarea ref="textareaEl" v-model="text" :class="[$style.text]" :disabled="posting || posted" :readonly="textAreaReadOnly" :placeholder="placeholder" data-cy-post-form-text @keydown="onKeydown" @paste="onPaste" @compositionupdate="onCompositionUpdate" @compositionend="onCompositionEnd"/>
 		<div v-if="maxTextLength - textLength < 100" :class="['_acrylic', $style.textCount, { [$style.textOver]: textLength > maxTextLength }]">{{ maxTextLength - textLength }}</div>
 	</div>
@@ -137,7 +137,7 @@ const modal = inject('modal');
 const props = withDefaults(defineProps<{
 	reply?: Misskey.entities.Note;
 	renote?: Misskey.entities.Note;
-	channel?: Misskey.entities.Channel; // TODO
+	channel?: Misskey.entities.Channel;
 	mention?: Misskey.entities.User;
 	specified?: Misskey.entities.User;
 	initialText?: string;
@@ -206,8 +206,22 @@ const imeText = ref('');
 const showingOptions = ref(false);
 const textAreaReadOnly = ref(false);
 
+const postChannel = ref<Misskey.entities.Channel | null>(props.channel ?? null);
+const postChannelName = computed<string>(() => postChannel.value?.name ?? '');
+
+/**
+ * {@link localOnly}が持つ値にチャンネル選択有無を加味した値を計算する（チャンネル選択時は強制的にfalse）
+ * チャンネル選択有無を考慮する必要がある場面では{@link localOnly}ではなくこの値を使用する。
+ */
+const actualLocalOnly = computed<boolean>(() => postChannel.value ? true : localOnly.value);
+/**
+ * {@link visibility}が持つ値にチャンネル選択有無を加味した値を計算する（チャンネル選択時は強制的にpublic）。
+ * チャンネル選択有無を考慮する必要がある場面では{@link actualVisibility}ではなくこの値を使用する。
+ */
+const actualVisibility = computed<typeof Misskey.noteVisibilities[number]>(() => postChannel.value ? 'public' : visibility.value);
+
 const draftKey = computed((): string => {
-	let key = props.channel ? `channel:${props.channel.id}` : '';
+	let key = postChannel.value ? `channel:${postChannel.value.id}` : '';
 
 	if (props.renote) {
 		key += `renote:${props.renote.id}`;
@@ -225,7 +239,7 @@ const placeholder = computed((): string => {
 		return i18n.ts._postForm.quotePlaceholder;
 	} else if (props.reply) {
 		return i18n.ts._postForm.replyPlaceholder;
-	} else if (props.channel) {
+	} else if (postChannel.value) {
 		return i18n.ts._postForm.channelPlaceholder;
 	} else {
 		const xs = [
@@ -270,7 +284,7 @@ watch(text, () => {
 	checkMissingMention();
 }, { immediate: true });
 
-watch(visibility, () => {
+watch(actualVisibility, () => {
 	checkMissingMention();
 }, { immediate: true });
 
@@ -314,11 +328,6 @@ if ($i.isSilenced && visibility.value === 'public') {
 	visibility.value = 'home';
 }
 
-if (props.channel) {
-	visibility.value = 'public';
-	localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
-}
-
 // 公開以外へのリプライ時は元の公開範囲を引き継ぐ
 if (props.reply && ['home', 'followers', 'specified'].includes(props.reply.visibility)) {
 	if (props.reply.visibility === 'home' && visibility.value === 'followers') {
@@ -368,7 +377,7 @@ function watchForDraft() {
 }
 
 function checkMissingMention() {
-	if (visibility.value === 'specified') {
+	if (actualVisibility.value === 'specified') {
 		const ast = mfm.parse(text.value);
 
 		for (const x of extractMentions(ast)) {
@@ -455,34 +464,29 @@ function upload(file: File, name?: string): void {
 }
 
 function setVisibility() {
-	if (props.channel) {
-		visibility.value = 'public';
-		localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
-		return;
-	}
-
 	os.popup(defineAsyncComponent(() => import('@/components/MkVisibilityPicker.vue')), {
-		currentVisibility: visibility.value,
+		currentVisibility: actualVisibility.value,
 		isSilenced: $i.isSilenced,
-		localOnly: localOnly.value,
+		// チャンネル→ダイレクトの選択変更ができなくなるので、チャンネル選択中の場合は意図的にfalseを渡すようにする
+		localOnly: postChannel.value ? false : actualLocalOnly.value,
 		src: visibilityButton.value,
+		currentChannel: postChannel.value,
 	}, {
 		changeVisibility: v => {
 			visibility.value = v;
+			postChannel.value = null;
 			if (defaultStore.state.rememberNoteVisibility) {
 				defaultStore.set('visibility', visibility.value);
 			}
 		},
+		changeChannel: channel => {
+			// computedで読み替えをするので、localOnlyとvisibilityの変更はしない
+			postChannel.value = channel;
+		},
 	}, 'closed');
 }
 
 async function toggleLocalOnly() {
-	if (props.channel) {
-		visibility.value = 'public';
-		localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
-		return;
-	}
-
 	const neverShowInfo = miLocalStorage.getItem('neverShowLocalOnlyInfo');
 
 	if (!localOnly.value && neverShowInfo !== 'true') {
@@ -715,7 +719,8 @@ async function post(ev?: MouseEvent) {
 		text.value.includes('$[scale') ||
 		text.value.includes('$[position');
 
-	if (annoying && visibility.value === 'public') {
+	// チャンネル投稿時はサーバサイド側でpublicに変更されているため警告を出す意味がない
+	if (annoying && actualVisibility.value === 'public' && !postChannel.value) {
 		const { canceled, result } = await os.actions({
 			type: 'warning',
 			text: i18n.ts.thisPostMayBeAnnoying,
@@ -744,12 +749,12 @@ async function post(ev?: MouseEvent) {
 		fileIds: files.value.length > 0 ? files.value.map(f => f.id) : undefined,
 		replyId: props.reply ? props.reply.id : undefined,
 		renoteId: props.renote ? props.renote.id : quoteId.value ? quoteId.value : undefined,
-		channelId: props.channel ? props.channel.id : undefined,
+		channelId: postChannel.value ? postChannel.value.id : undefined,
 		poll: poll.value,
 		cw: useCw.value ? cw.value ?? '' : null,
-		localOnly: localOnly.value,
-		visibility: visibility.value,
-		visibleUserIds: visibility.value === 'specified' ? visibleUsers.value.map(u => u.id) : undefined,
+		localOnly: actualLocalOnly.value,
+		visibility: actualVisibility.value,
+		visibleUserIds: actualVisibility.value === 'specified' ? visibleUsers.value.map(u => u.id) : undefined,
 		reactionAcceptance: reactionAcceptance.value,
 	};
 
diff --git a/packages/frontend/src/components/MkVisibilityPicker.vue b/packages/frontend/src/components/MkVisibilityPicker.vue
index 1324ed12e1..515bcd1530 100644
--- a/packages/frontend/src/components/MkVisibilityPicker.vue
+++ b/packages/frontend/src/components/MkVisibilityPicker.vue
@@ -9,61 +9,117 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<div :class="[$style.label, $style.item]">
 			{{ i18n.ts.visibility }}
 		</div>
-		<button key="public" :disabled="isSilenced" class="_button" :class="[$style.item, { [$style.active]: v === 'public' }]" data-index="1" @click="choose('public')">
+		<button key="public" :disabled="isSilenced" class="_button" :class="[$style.item, { [$style.active]: v === 'public' &&!currentChannel }]" data-index="1" @click="choose('public')">
 			<div :class="$style.icon"><i class="ti ti-world"></i></div>
 			<div :class="$style.body">
 				<span :class="$style.itemTitle">{{ i18n.ts._visibility.public }}</span>
 				<span :class="$style.itemDescription">{{ i18n.ts._visibility.publicDescription }}</span>
 			</div>
 		</button>
-		<button key="home" class="_button" :class="[$style.item, { [$style.active]: v === 'home' }]" data-index="2" @click="choose('home')">
+		<button key="home" class="_button" :class="[$style.item, { [$style.active]: v === 'home' && !currentChannel }]" data-index="2" @click="choose('home')">
 			<div :class="$style.icon"><i class="ti ti-home"></i></div>
 			<div :class="$style.body">
 				<span :class="$style.itemTitle">{{ i18n.ts._visibility.home }}</span>
 				<span :class="$style.itemDescription">{{ i18n.ts._visibility.homeDescription }}</span>
 			</div>
 		</button>
-		<button key="followers" class="_button" :class="[$style.item, { [$style.active]: v === 'followers' }]" data-index="3" @click="choose('followers')">
+		<button key="followers" class="_button" :class="[$style.item, { [$style.active]: v === 'followers' && !currentChannel }]" data-index="3" @click="choose('followers')">
 			<div :class="$style.icon"><i class="ti ti-lock"></i></div>
 			<div :class="$style.body">
 				<span :class="$style.itemTitle">{{ i18n.ts._visibility.followers }}</span>
 				<span :class="$style.itemDescription">{{ i18n.ts._visibility.followersDescription }}</span>
 			</div>
 		</button>
-		<button key="specified" :disabled="localOnly" class="_button" :class="[$style.item, { [$style.active]: v === 'specified' }]" data-index="4" @click="choose('specified')">
+		<button key="specified" :disabled="localOnly" class="_button" :class="[$style.item, { [$style.active]: v === 'specified' && !currentChannel }]" data-index="4" @click="choose('specified')">
 			<div :class="$style.icon"><i class="ti ti-mail"></i></div>
 			<div :class="$style.body">
 				<span :class="$style.itemTitle">{{ i18n.ts._visibility.specified }}</span>
 				<span :class="$style.itemDescription">{{ i18n.ts._visibility.specifiedDescription }}</span>
 			</div>
 		</button>
+		<button ref="channelsButton" class="_button" :class="[$style.item, { [$style.active]: currentChannel }]" data-index="5" @click="chooseChannel">
+			<div :class="$style.channelWrapper" :style="[currentChannel ? {borderLeftColor: `${currentChannel.color}`} : {}]">
+				<div :class="$style.icon">
+					<i class="ti ti-device-tv"></i>
+				</div>
+				<div :class="$style.body">
+					<span :class="$style.itemTitle">{{ i18n.ts._visibility.channel }}</span>
+					<span :class="$style.itemDescription">
+						<span v-if="currentChannelName">{{ i18n.t('_visibility.channelSelected', { name: currentChannelName }) }}</span>
+						<span v-else>{{ i18n.ts._visibility.channelDescription }}</span>
+					</span>
+				</div>
+			</div>
+		</button>
 	</div>
 </MkModal>
 </template>
 
 <script lang="ts" setup>
-import { nextTick, shallowRef, ref } from 'vue';
+import { nextTick, shallowRef, ref, computed } from 'vue';
 import * as Misskey from 'misskey-js';
 import MkModal from '@/components/MkModal.vue';
 import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+import { misskeyApi } from '@/scripts/misskey-api.js';
 
 const modal = shallowRef<InstanceType<typeof MkModal>>();
+const channelsButton = shallowRef<InstanceType<typeof HTMLButtonElement>>();
 
 const props = withDefaults(defineProps<{
 	currentVisibility: typeof Misskey.noteVisibilities[number];
 	isSilenced: boolean;
 	localOnly: boolean;
 	src?: HTMLElement;
+  currentChannel?: Misskey.entities.Channel
 }>(), {
 });
 
 const emit = defineEmits<{
 	(ev: 'changeVisibility', v: typeof Misskey.noteVisibilities[number]): void;
+  (ev: 'changeChannel', v: Misskey.entities.Channel) : void
 	(ev: 'closed'): void;
 }>();
 
 const v = ref(props.currentVisibility);
 
+/**
+ * Visibility とチャンネルはそれぞれ独立だけど、今のところはチャンネル投稿は連合なしだし公開範囲も変更できないようである
+
+ packages/frontend/src/components/MkPostForm.vue :475
+ if (props.channel) {
+ visibility.value = 'public';
+ localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
+ return;
+ }
+
+ */
+const channels = ref<Misskey.entities.Channel[]>([]);
+const currentChannel = ref<Misskey.entities.Channel | undefined>(props.currentChannel);
+const currentChannelName = computed<string | null>(() => currentChannel.value?.name ?? null);
+
+async function fetchChannels() {
+	const res = await misskeyApi('channels/my-favorites', {
+		limit: 100,
+	});
+	channels.value.splice(0, 0, ...res);
+}
+
+async function chooseChannel() {
+	let selectedChannel: Misskey.entities.Channel | null = null;
+	await os.popupMenu(
+		channels.value.map(it => ({ type: 'button', text: it.name, action: (_) => selectedChannel = it })),
+		channelsButton.value,
+	);
+
+	if (selectedChannel) {
+		emit('changeChannel', selectedChannel);
+	}
+
+	await nextTick();
+	if (modal.value) modal.value.close();
+}
+
 function choose(visibility: typeof Misskey.noteVisibilities[number]): void {
 	v.value = visibility;
 	emit('changeVisibility', visibility);
@@ -71,6 +127,8 @@ function choose(visibility: typeof Misskey.noteVisibilities[number]): void {
 		if (modal.value) modal.value.close();
 	});
 }
+
+fetchChannels();
 </script>
 
 <style lang="scss" module>
@@ -154,4 +212,13 @@ function choose(visibility: typeof Misskey.noteVisibilities[number]): void {
 .itemDescription {
 	opacity: 0.6;
 }
+
+.channelWrapper {
+	display: flex;
+	margin-left: -6px;
+	padding-left: 4px;
+	border-left-width: 2px;
+	border-left-style: solid;
+	border-left-color: transparent;
+}
 </style>