diff --git a/CHANGELOG.md b/CHANGELOG.md
index f72830776..4ef13da57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ You should also include the user name that made the change.
 - Playのソースコード上限文字数を2倍に拡張
 
 ### Bugfixes
+- プロフィールで設定した情報が削除できない問題を修正
 - ロールで広告を無効にするとadmin/adsでプレビューがでてこない問題を修正
 - /api-consoleページにアクセスすると404が出る問題を修正
 - SMTP Login id length is too short
diff --git a/packages/frontend/src/pages/settings/profile.vue b/packages/frontend/src/pages/settings/profile.vue
index 4776a87d5..a5f6c11f8 100644
--- a/packages/frontend/src/pages/settings/profile.vue
+++ b/packages/frontend/src/pages/settings/profile.vue
@@ -134,11 +134,17 @@ function saveFields() {
 
 function save() {
 	os.apiWithDialog('i/update', {
-		name: profile.name ?? null,
-		description: profile.description ?? null,
-		location: profile.location ?? null,
-		birthday: profile.birthday ?? null,
-		lang: profile.lang ?? null,
+		// 空文字列をnullにしたいので??は使うな
+		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+		name: profile.name || null,
+		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+		description: profile.description || null,
+		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+		location: profile.location || null,
+		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+		birthday: profile.birthday || null,
+		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+		lang: profile.lang || null,
 		isBot: !!profile.isBot,
 		isCat: !!profile.isCat,
 		showTimelineReplies: !!profile.showTimelineReplies,