diff --git a/packages/frontend/src/components/MkUploaderDialog.vue b/packages/frontend/src/components/MkUploaderDialog.vue
index 723b129822..3a83247d4b 100644
--- a/packages/frontend/src/components/MkUploaderDialog.vue
+++ b/packages/frontend/src/components/MkUploaderDialog.vue
@@ -51,6 +51,10 @@ SPDX-License-Identifier: AGPL-3.0-only
 				</div>
 			</div>
 
+			<div v-if="props.multiple">
+				<MkButton style="margin: auto;" :iconOnly="true" rounded @click="chooseFile($event)"><i class="ti ti-plus"></i></MkButton>
+			</div>
+
 			<MkSelect
 				v-if="items.length > 0"
 				v-model="compressionLevel"
@@ -123,8 +127,9 @@ const mimeTypeMap = {
 const props = withDefaults(defineProps<{
 	files: File[];
 	folderId?: string | null;
+	multiple?: boolean;
 }>(), {
-
+	multiple: true,
 });
 
 const emit = defineEmits<{
@@ -316,22 +321,34 @@ async function upload() { // エラーハンドリングなどを考慮してシ
 	}
 }
 
+async function chooseFile(ev: MouseEvent) {
+	const newFiles = await os.chooseFileFromPc({ multiple: true });
+
+	for (const file of newFiles) {
+		initializeFile(file);
+	}
+}
+
+function initializeFile(file: File) {
+	const id = uuid();
+	const filename = file.name ?? 'untitled';
+	const extension = filename.split('.').length > 1 ? '.' + filename.split('.').pop() : '';
+	items.value.push({
+		id,
+		name: prefer.s.keepOriginalFilename ? filename : id + extension,
+		progress: null,
+		thumbnail: window.URL.createObjectURL(file),
+		waiting: false,
+		uploading: false,
+		uploaded: null,
+		uploadFailed: false,
+		file: markRaw(file),
+	});
+}
+
 onMounted(() => {
 	for (const file of props.files) {
-		const id = uuid();
-		const filename = file.name ?? 'untitled';
-		const extension = filename.split('.').length > 1 ? '.' + filename.split('.').pop() : '';
-		items.value.push({
-			id,
-			name: prefer.s.keepOriginalFilename ? filename : id + extension,
-			progress: null,
-			thumbnail: window.URL.createObjectURL(file),
-			waiting: false,
-			uploading: false,
-			uploaded: null,
-			uploadFailed: false,
-			file: markRaw(file),
-		});
+		initializeFile(file);
 	}
 });
 </script>
diff --git a/packages/frontend/src/components/MkUserSetupDialog.Profile.vue b/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
index ce3192e230..4e96eff82e 100644
--- a/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
+++ b/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
@@ -85,7 +85,7 @@ async function setAvatar(ev) {
 		});
 	}
 
-	const driveFile = (await os.launchUploader([originalOrCropped], {}))[0];
+	const driveFile = (await os.launchUploader([originalOrCropped], { multiple: false }))[0];
 
 	const i = await os.apiWithDialog('i/update', {
 		avatarId: driveFile.id,
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index 54fa5a5af9..6d49408f26 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -772,6 +772,7 @@ export function launchUploader(
 	files: File[],
 	options?: {
 		folderId?: string | null;
+		multiple?: boolean;
 	},
 ): Promise<Misskey.entities.DriveFile[]> {
 	return new Promise((res, rej) => {
@@ -779,6 +780,7 @@ export function launchUploader(
 		const { dispose } = popup(defineAsyncComponent(() => import('@/components/MkUploaderDialog.vue')), {
 			files: markRaw(files),
 			folderId: options?.folderId,
+			multiple: options?.multiple,
 		}, {
 			done: driveFiles => {
 				if (driveFiles.length === 0) return rej();
diff --git a/packages/frontend/src/pages/chat/room.form.vue b/packages/frontend/src/pages/chat/room.form.vue
index 6702cd2ec1..7e3be67230 100644
--- a/packages/frontend/src/pages/chat/room.form.vue
+++ b/packages/frontend/src/pages/chat/room.form.vue
@@ -86,7 +86,7 @@ async function onPaste(ev: ClipboardEvent) {
 			const ext = lio >= 0 ? pastedFile.name.slice(lio) : '';
 			const formattedName = formatTimeString(new Date(pastedFile.lastModified), pastedFileName).replace(/{{number}}/g, '1') + ext;
 			const renamedFile = new File([pastedFile], formattedName, { type: pastedFile.type });
-			os.launchUploader([renamedFile], {}).then(driveFiles => {
+			os.launchUploader([renamedFile], { multiple: false }).then(driveFiles => {
 				file.value = driveFiles[0];
 			});
 		}
@@ -131,7 +131,7 @@ function onDrop(ev: DragEvent): void {
 	// ファイルだったら
 	if (ev.dataTransfer.files.length === 1) {
 		ev.preventDefault();
-		os.launchUploader([Array.from(ev.dataTransfer.files)[0]], {});
+		os.launchUploader([Array.from(ev.dataTransfer.files)[0]], { multiple: false });
 		return;
 	} else if (ev.dataTransfer.files.length > 1) {
 		ev.preventDefault();
@@ -177,7 +177,7 @@ function onChangeFile() {
 	if (fileEl.value == null || fileEl.value.files == null) return;
 
 	if (fileEl.value.files[0]) {
-		os.launchUploader(Array.from(fileEl.value.files), {}).then(driveFiles => {
+		os.launchUploader(Array.from(fileEl.value.files), { multiple: false }).then(driveFiles => {
 			file.value = driveFiles[0];
 		});
 	}
diff --git a/packages/frontend/src/pages/settings/profile.vue b/packages/frontend/src/pages/settings/profile.vue
index df637d9e9a..cd1565f39e 100644
--- a/packages/frontend/src/pages/settings/profile.vue
+++ b/packages/frontend/src/pages/settings/profile.vue
@@ -291,7 +291,7 @@ function changeAvatar(ev) {
 				});
 			}
 
-			const driveFile = (await os.launchUploader([originalOrCropped], {}))[0];
+			const driveFile = (await os.launchUploader([originalOrCropped], { multiple: false }))[0];
 			done(driveFile);
 		},
 	}, {
@@ -339,7 +339,7 @@ function changeBanner(ev) {
 				});
 			}
 
-			const driveFile = (await os.launchUploader([originalOrCropped], {}))[0];
+			const driveFile = (await os.launchUploader([originalOrCropped], { multiple: false }))[0];
 			done(driveFile);
 		},
 	}, {