diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f32284f9b..976db8a6f4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,7 @@
 ## 13.x.x (unreleased)
 
 ### General
--
+- コンディショナルロールの条件に「投稿数が～以下」「投稿数が～以上」を追加
 
 ### Client
 - センシティブワードの一覧にピン留めユーザーのIDが表示される問題を修正
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 2011ca3636..36d4a4f2f2 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1279,6 +1279,8 @@ _role:
     followersMoreThanOrEq: "フォロワー数が～以上"
     followingLessThanOrEq: "フォロー数が～以下"
     followingMoreThanOrEq: "フォロー数が～以上"
+    notesLessThanOrEq: "投稿数が～以下"
+    notesMoreThanOrEq: "投稿数が～以上"
     and: "～かつ～"
     or: "～または～"
     not: "～ではない"
@@ -1929,4 +1931,4 @@ _disabledTimeline:
 
 _drivecleaner:
   orderBySizeDesc: "サイズが大きい順"
-  orderByCreatedAtAsc: "追加日が古い順"
\ No newline at end of file
+  orderByCreatedAtAsc: "追加日が古い順"
diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index 4775196c6f..bb7680f4e5 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -192,6 +192,12 @@ export class RoleService implements OnApplicationShutdown {
 				case 'followingMoreThanOrEq': {
 					return user.followingCount >= value.value;
 				}
+				case 'notesLessThanOrEq': {
+					return user.notesCount <= value.value;
+				}
+				case 'notesMoreThanOrEq': {
+					return user.notesCount >= value.value;
+				}
 				default:
 					return false;
 			}
diff --git a/packages/backend/src/models/entities/Role.ts b/packages/backend/src/models/entities/Role.ts
index 85ff266740..eca9bcf270 100644
--- a/packages/backend/src/models/entities/Role.ts
+++ b/packages/backend/src/models/entities/Role.ts
@@ -54,6 +54,16 @@ type CondFormulaValueFollowingMoreThanOrEq = {
 	value: number;
 };
 
+type CondFormulaValueNotesLessThanOrEq = {
+	type: 'notesLessThanOrEq';
+	value: number;
+};
+
+type CondFormulaValueNotesMoreThanOrEq = {
+	type: 'notesMoreThanOrEq';
+	value: number;
+};
+
 export type RoleCondFormulaValue =
 	CondFormulaValueAnd |
 	CondFormulaValueOr |
@@ -65,7 +75,9 @@ export type RoleCondFormulaValue =
 	CondFormulaValueFollowersLessThanOrEq |
 	CondFormulaValueFollowersMoreThanOrEq |
 	CondFormulaValueFollowingLessThanOrEq |
-	CondFormulaValueFollowingMoreThanOrEq;
+	CondFormulaValueFollowingMoreThanOrEq |
+	CondFormulaValueNotesLessThanOrEq |
+	CondFormulaValueNotesMoreThanOrEq;
 
 @Entity()
 export class Role {
diff --git a/packages/frontend/src/pages/admin/RolesEditorFormula.vue b/packages/frontend/src/pages/admin/RolesEditorFormula.vue
index 07729b8cf9..343d2c4c5c 100644
--- a/packages/frontend/src/pages/admin/RolesEditorFormula.vue
+++ b/packages/frontend/src/pages/admin/RolesEditorFormula.vue
@@ -10,6 +10,8 @@
 			<option value="followersMoreThanOrEq">{{ i18n.ts._role._condition.followersMoreThanOrEq }}</option>
 			<option value="followingLessThanOrEq">{{ i18n.ts._role._condition.followingLessThanOrEq }}</option>
 			<option value="followingMoreThanOrEq">{{ i18n.ts._role._condition.followingMoreThanOrEq }}</option>
+			<option value="notesLessThanOrEq">{{ i18n.ts._role._condition.notesLessThanOrEq }}</option>
+			<option value="notesMoreThanOrEq">{{ i18n.ts._role._condition.notesMoreThanOrEq }}</option>
 			<option value="and">{{ i18n.ts._role._condition.and }}</option>
 			<option value="or">{{ i18n.ts._role._condition.or }}</option>
 			<option value="not">{{ i18n.ts._role._condition.not }}</option>
@@ -42,7 +44,7 @@
 		<template #suffix>sec</template>
 	</MkInput>
 
-	<MkInput v-else-if="['followersLessThanOrEq', 'followersMoreThanOrEq', 'followingLessThanOrEq', 'followingMoreThanOrEq'].includes(type)" v-model="v.value" type="number">
+	<MkInput v-else-if="['followersLessThanOrEq', 'followersMoreThanOrEq', 'followingLessThanOrEq', 'followingMoreThanOrEq', 'notesLessThanOrEq', 'notesMoreThanOrEq'].includes(type)" v-model="v.value" type="number">
 	</MkInput>
 </div>
 </template>
@@ -91,6 +93,8 @@ const type = computed({
 		if (t === 'followersMoreThanOrEq') v.value.value = 10;
 		if (t === 'followingLessThanOrEq') v.value.value = 10;
 		if (t === 'followingMoreThanOrEq') v.value.value = 10;
+		if (t === 'notesLessThanOrEq') v.value.value = 10;
+		if (t === 'notesMoreThanOrEq') v.value.value = 10;
 		v.value.type = t;
 	},
 });