diff --git a/docs/v3-api.yaml b/docs/v3-api.yaml
index 12fbb3aeb..86fb5118e 100644
--- a/docs/v3-api.yaml
+++ b/docs/v3-api.yaml
@@ -1311,6 +1311,35 @@ paths:
             ユーザーが見つかりません。
       operationId: getUserStats
       description: 指定したユーザーの統計情報を取得します。
+  '/channels/{channelId}/audiences':
+    parameters:
+      - $ref: '#/components/parameters/channelIdInPath'
+    get:
+      summary: チャンネルの未読管理者のリストを取得
+      tags:
+        - channel
+        - notification
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                description: 未読管理者UUIDの配列
+                items:
+                  type: string
+                  format: uuid
+        '403':
+          description: |-
+            Forbidden
+            プライベートチャンネル・強制通知チャンネルの設定は取得できません。
+        '404':
+          description: |-
+            Not Found
+            チャンネルが見つかりません。
+      operationId: getChannelAudiences
+      description: 指定したチャンネルを未読管理しているユーザーのUUIDのリストを取得します。
   '/channels/{channelId}/subscribers':
     parameters:
       - $ref: '#/components/parameters/channelIdInPath'
diff --git a/router/v3/channels.go b/router/v3/channels.go
index 976630d9d..85cbfe558 100644
--- a/router/v3/channels.go
+++ b/router/v3/channels.go
@@ -293,6 +293,27 @@ func (h *Handlers) GetChannelSubscribers(c echo.Context) error {
 	return c.JSON(http.StatusOK, result)
 }
 
+// GetChannelAudiences GET /channels/:channelID/audiences
+func (h *Handlers) GetChannelAudiences(c echo.Context) error {
+	ch := getParamChannel(c)
+
+	// プライベートチャンネル・強制通知チャンネルの設定は取得できない。
+	if !ch.IsPublic || ch.IsForced {
+		return herror.Forbidden()
+	}
+
+	audiences, err := h.Repo.GetChannelSubscriptions(repository.ChannelSubscriptionQuery{}.SetChannel(ch.ID).SetLevel(model.ChannelSubscribeLevelMark))
+	if err != nil {
+		return herror.InternalServerError(err)
+	}
+	result := make([]uuid.UUID, 0)
+	for _, audience := range audiences {
+		result = append(result, audience.UserID)
+	}
+
+	return c.JSON(http.StatusOK, result)
+}
+
 // PutChannelSubscribersRequest PUT /channels/:channelID/subscribers リクエストボディ
 type PutChannelSubscribersRequest struct {
 	On set.UUID `json:"on"`
diff --git a/router/v3/channels_test.go b/router/v3/channels_test.go
index fa4e56d49..b6b28ccfa 100644
--- a/router/v3/channels_test.go
+++ b/router/v3/channels_test.go
@@ -831,9 +831,82 @@ func TestHandlers_GetChannelSubscribers(t *testing.T) {
 	env := Setup(t, common1)
 	user := env.CreateUser(t, rand)
 	user2 := env.CreateUser(t, rand)
+	user3 := env.CreateUser(t, rand)
 	channel := env.CreateChannel(t, rand)
 	err := env.CM.ChangeChannelSubscriptions(channel.ID, map[uuid.UUID]model.ChannelSubscribeLevel{
-		user.GetID(): model.ChannelSubscribeLevelMarkAndNotify,
+		user.GetID():  model.ChannelSubscribeLevelMarkAndNotify,
+		user2.GetID(): model.ChannelSubscribeLevelNone,
+		user3.GetID(): model.ChannelSubscribeLevelMark,
+	}, false, user.GetID())
+	require.NoError(t, err)
+	forced := env.CreateChannel(t, rand)
+	require.NoError(t, env.CM.UpdateChannel(forced.ID, repository.UpdateChannelArgs{ForcedNotification: optional.From(true)}))
+	dm := env.CreateDMChannel(t, user.GetID(), user2.GetID())
+	commonSession := env.S(t, user.GetID())
+
+	t.Run("not logged in", func(t *testing.T) {
+		t.Parallel()
+		e := env.R(t)
+		e.GET(path, channel.ID).
+			Expect().
+			Status(http.StatusUnauthorized)
+	})
+
+	t.Run("not found", func(t *testing.T) {
+		t.Parallel()
+		e := env.R(t)
+		e.GET(path, uuid.Must(uuid.NewV4()).String()).
+			WithCookie(session.CookieName, commonSession).
+			Expect().
+			Status(http.StatusNotFound)
+	})
+
+	t.Run("forbidden (forced)", func(t *testing.T) {
+		t.Parallel()
+		e := env.R(t)
+		e.GET(path, forced.ID.String()).
+			WithCookie(session.CookieName, commonSession).
+			Expect().
+			Status(http.StatusForbidden)
+	})
+
+	t.Run("forbidden (dm)", func(t *testing.T) {
+		t.Parallel()
+		e := env.R(t)
+		e.GET(path, dm.ID.String()).
+			WithCookie(session.CookieName, commonSession).
+			Expect().
+			Status(http.StatusForbidden)
+	})
+
+	t.Run("success", func(t *testing.T) {
+		t.Parallel()
+		e := env.R(t)
+		obj := e.GET(path, channel.ID.String()).
+			WithCookie(session.CookieName, commonSession).
+			Expect().
+			Status(http.StatusOK).
+			JSON().
+			Array()
+
+		obj.Length().IsEqual(1)
+		obj.Value(0).String().IsEqual(user.GetID().String())
+	})
+}
+
+func TestHandlers_GetChannelAudiences(t *testing.T) {
+	t.Parallel()
+
+	path := "/api/v3/channels/{channelId}/audiences"
+	env := Setup(t, common1)
+	user := env.CreateUser(t, rand)
+	user2 := env.CreateUser(t, rand)
+	user3 := env.CreateUser(t, rand)
+	channel := env.CreateChannel(t, rand)
+	err := env.CM.ChangeChannelSubscriptions(channel.ID, map[uuid.UUID]model.ChannelSubscribeLevel{
+		user.GetID():  model.ChannelSubscribeLevelMark,
+		user2.GetID(): model.ChannelSubscribeLevelNone,
+		user3.GetID(): model.ChannelSubscribeLevelMarkAndNotify,
 	}, false, user.GetID())
 	require.NoError(t, err)
 	forced := env.CreateChannel(t, rand)
diff --git a/router/v3/router.go b/router/v3/router.go
index 721d1b4b7..93e55b232 100644
--- a/router/v3/router.go
+++ b/router/v3/router.go
@@ -185,6 +185,7 @@ func (h *Handlers) Setup(e *echo.Group) {
 				apiChannelsCID.PUT("/topic", h.EditChannelTopic, requires(permission.EditChannelTopic))
 				apiChannelsCID.GET("/viewers", h.GetChannelViewers, requires(permission.GetChannel))
 				apiChannelsCID.GET("/pins", h.GetChannelPins, requires(permission.GetMessage))
+				apiChannelsCID.GET("/audiences", h.GetChannelAudiences, requires(permission.GetChannelSubscription))
 				apiChannelsCID.GET("/subscribers", h.GetChannelSubscribers, requires(permission.GetChannelSubscription))
 				apiChannelsCID.PUT("/subscribers", h.SetChannelSubscribers, requires(permission.EditChannelSubscription))
 				apiChannelsCID.PATCH("/subscribers", h.EditChannelSubscribers, requires(permission.EditChannelSubscription))