diff --git a/packages/backend/migration/1676438468213-ad3.js b/packages/backend/migration/1676438468213-ad3.js
index 082bb31325..c55f6ae361 100644
--- a/packages/backend/migration/1676438468213-ad3.js
+++ b/packages/backend/migration/1676438468213-ad3.js
@@ -1,9 +1,9 @@
 export class ad1676438468213 {
 	name = 'ad1676438468213';
 	async up(queryRunner) {
-			await queryRunner.query(`ALTER TABLE "ad" ADD "startAt" TIMESTAMP WITH TIME ZONE NOT NULL`);
+			await queryRunner.query(`ALTER TABLE "ad" ADD "startsAt" TIMESTAMP WITH TIME ZONE NOT NULL`);
 	}
 	async down(queryRunner) {
-		await queryRunner.query(`ALTER TABLE "role" DROP COLUMN "startAt"`);
+		await queryRunner.query(`ALTER TABLE "role" DROP COLUMN "startsAt"`);
 	}
 }
diff --git a/packages/backend/src/models/entities/Ad.ts b/packages/backend/src/models/entities/Ad.ts
index c87932adb6..450336a016 100644
--- a/packages/backend/src/models/entities/Ad.ts
+++ b/packages/backend/src/models/entities/Ad.ts
@@ -22,7 +22,7 @@ export class Ad {
 	@Column('timestamp with time zone', {
 		comment: 'The expired date of the Ad.',
 	})
-	public startAt: Date;
+	public startsAt: Date;
 
 	@Column('varchar', {
 		length: 32, nullable: false,
diff --git a/packages/backend/src/server/api/endpoints/admin/ad/create.ts b/packages/backend/src/server/api/endpoints/admin/ad/create.ts
index ba128c75a7..917242db3f 100644
--- a/packages/backend/src/server/api/endpoints/admin/ad/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/ad/create.ts
@@ -20,10 +20,10 @@ export const paramDef = {
 		priority: { type: 'string' },
 		ratio: { type: 'integer' },
 		expiresAt: { type: 'integer' },
-		startAt: { type: 'integer' },
+		startsAt: { type: 'integer' },
 		imageUrl: { type: 'string', minLength: 1 },
 	},
-	required: ['url', 'memo', 'place', 'priority', 'ratio', 'expiresAt', 'startAt', 'imageUrl'],
+	required: ['url', 'memo', 'place', 'priority', 'ratio', 'expiresAt', 'startsAt', 'imageUrl'],
 } as const;
 
 // eslint-disable-next-line import/no-default-export
@@ -40,7 +40,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				id: this.idService.genId(),
 				createdAt: new Date(),
 				expiresAt: new Date(ps.expiresAt),
-				startAt: new Date(ps.startAt),
+				startsAt: new Date(ps.startsAt),
 				url: ps.url,
 				imageUrl: ps.imageUrl,
 				priority: ps.priority,
diff --git a/packages/backend/src/server/api/endpoints/admin/ad/update.ts b/packages/backend/src/server/api/endpoints/admin/ad/update.ts
index 75f6f1d5ad..dbab7e9d4f 100644
--- a/packages/backend/src/server/api/endpoints/admin/ad/update.ts
+++ b/packages/backend/src/server/api/endpoints/admin/ad/update.ts
@@ -30,9 +30,9 @@ export const paramDef = {
 		priority: { type: 'string' },
 		ratio: { type: 'integer' },
 		expiresAt: { type: 'integer' },
-		startAt: { type: 'integer' },
+		startsAt: { type: 'integer' },
 	},
-	required: ['id', 'memo', 'url', 'imageUrl', 'place', 'priority', 'ratio', 'expiresAt', 'startAt'],
+	required: ['id', 'memo', 'url', 'imageUrl', 'place', 'priority', 'ratio', 'expiresAt', 'startsAt'],
 } as const;
 
 // eslint-disable-next-line import/no-default-export
@@ -55,7 +55,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				memo: ps.memo,
 				imageUrl: ps.imageUrl,
 				expiresAt: new Date(ps.expiresAt),
-				startAt: new Date(ps.startAt),
+				startsAt: new Date(ps.startsAt),
 			});
 		});
 	}
diff --git a/packages/backend/src/server/api/endpoints/meta.ts b/packages/backend/src/server/api/endpoints/meta.ts
index 823c3f72b0..d688aaca10 100644
--- a/packages/backend/src/server/api/endpoints/meta.ts
+++ b/packages/backend/src/server/api/endpoints/meta.ts
@@ -262,7 +262,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			const ads = await this.adsRepository.find({
 				where: {
 					expiresAt: MoreThan(new Date()),
-					startAt: LessThanOrEqual(new Date()),
+					startsAt: LessThanOrEqual(new Date()),
 				},
 			});
 
diff --git a/packages/frontend/src/pages/admin/ads.vue b/packages/frontend/src/pages/admin/ads.vue
index 88131fce89..e5431b177c 100644
--- a/packages/frontend/src/pages/admin/ads.vue
+++ b/packages/frontend/src/pages/admin/ads.vue
@@ -29,7 +29,7 @@
 					<MkInput v-model="ad.ratio" type="number">
 						<template #label>{{ i18n.ts.ratio }}</template>
 					</MkInput>
-					<MkInput v-model="ad.startAt" type="datetime-local">
+					<MkInput v-model="ad.startsAt" type="datetime-local">
 						<template #label>{{ i18n.ts.startingperiod }}</template>
 					</MkInput>
 					<MkInput v-model="ad.expiresAt" type="datetime-local">
@@ -70,13 +70,13 @@ const localTimeDiff = localTime.getTimezoneOffset() * 60 * 1000;
 os.api('admin/ad/list').then(adsResponse => {
 	ads = adsResponse.map(r => {
 		const exdate = new Date(r.expiresAt);
-		const stdate = new Date(r.startAt);
+		const stdate = new Date(r.startsAt);
 		exdate.setMilliseconds(exdate.getMilliseconds() - localTimeDiff);
 		stdate.setMilliseconds(stdate.getMilliseconds() - localTimeDiff);
 		return {
 			...r,
 			expiresAt: exdate.toISOString().slice(0, 16),
-			startAt: stdate.toISOString().slice(0, 16),
+			startsAt: stdate.toISOString().slice(0, 16),
 		};
 	});
 });
@@ -91,7 +91,7 @@ function add() {
 		url: '',
 		imageUrl: null,
 		expiresAt: null,
-		startAt: null,
+		startsAt: null,
 	});
 }
 
@@ -113,13 +113,13 @@ function save(ad) {
 		os.apiWithDialog('admin/ad/create', {
 			...ad,
 			expiresAt: new Date(ad.expiresAt).getTime(),
-			startAt: new Date(ad.startAt).getTime(),
+			startsAt: new Date(ad.startsAt).getTime(),
 		});
 	} else {
 		os.apiWithDialog('admin/ad/update', {
 			...ad,
 			expiresAt: new Date(ad.expiresAt).getTime(),
-			startAt: new Date(ad.startAt).getTime(),
+			startsAt: new Date(ad.startsAt).getTime(),
 		});
 	}
 }