diff --git a/tools/asynq/cmd/dash/key_event.go b/tools/asynq/cmd/dash/key_event.go
index 4a331a8..0ed57e4 100644
--- a/tools/asynq/cmd/dash/key_event.go
+++ b/tools/asynq/cmd/dash/key_event.go
@@ -107,7 +107,7 @@ func (h *keyEventHandler) downKeyQueueDetails() {
 		} else {
 			state.groupTableRowIdx = 0 // loop back
 		}
-	} else {
+	} else if state.taskID == "" {
 		if state.taskTableRowIdx < len(state.tasks) {
 			state.taskTableRowIdx++
 		} else {
@@ -144,7 +144,7 @@ func (h *keyEventHandler) upKeyQueueDetails() {
 		} else {
 			state.groupTableRowIdx--
 		}
-	} else {
+	} else if state.taskID == "" {
 		if state.taskTableRowIdx == 0 {
 			state.taskTableRowIdx = len(state.tasks)
 		} else {
@@ -215,7 +215,7 @@ func (h *keyEventHandler) handleLeftKey() {
 		f     = h.fetcher
 		d     = h.drawer
 	)
-	if state.view == viewTypeQueueDetails {
+	if state.view == viewTypeQueueDetails && state.taskID == "" {
 		state.taskState = prevTaskState(state.taskState)
 		state.pageNum = 1
 		state.taskTableRowIdx = 0
@@ -233,7 +233,7 @@ func (h *keyEventHandler) handleRightKey() {
 		f     = h.fetcher
 		d     = h.drawer
 	)
-	if state.view == viewTypeQueueDetails {
+	if state.view == viewTypeQueueDetails && state.taskID == "" {
 		state.taskState = nextTaskState(state.taskState)
 		state.pageNum = 1
 		state.taskTableRowIdx = 0
diff --git a/tools/asynq/cmd/dash/key_event_test.go b/tools/asynq/cmd/dash/key_event_test.go
index f84ca45..cb60ab9 100644
--- a/tools/asynq/cmd/dash/key_event_test.go
+++ b/tools/asynq/cmd/dash/key_event_test.go
@@ -164,6 +164,48 @@ func TestKeyEventHandler(t *testing.T) {
 				taskID:          "", // this field should be unset
 			},
 		},
+		{
+			desc: "Arrow keys are disabled while task info modal is open",
+			state: &State{
+				view: viewTypeQueueDetails,
+				queues: []*asynq.QueueInfo{
+					{Queue: "default", Size: 500, Active: 10, Pending: 40},
+				},
+				queueTableRowIdx: 1,
+				selectedQueue:    &asynq.QueueInfo{Queue: "default", Size: 50, Active: 10, Pending: 40},
+				taskState:        asynq.TaskStatePending,
+				pageNum:          1,
+				tasks: []*asynq.TaskInfo{
+					{ID: "xxxx", Type: "foo"},
+					{ID: "yyyy", Type: "bar"},
+					{ID: "zzzz", Type: "baz"},
+				},
+				taskTableRowIdx: 2,
+				taskID:          "yyyy", // presence of this field opens the modal
+			},
+			events: []*tcell.EventKey{
+				tcell.NewEventKey(tcell.KeyLeft, ' ', tcell.ModNone),
+			},
+
+			// no change
+			wantState: State{
+				view: viewTypeQueueDetails,
+				queues: []*asynq.QueueInfo{
+					{Queue: "default", Size: 500, Active: 10, Pending: 40},
+				},
+				queueTableRowIdx: 1,
+				selectedQueue:    &asynq.QueueInfo{Queue: "default", Size: 50, Active: 10, Pending: 40},
+				taskState:        asynq.TaskStatePending,
+				pageNum:          1,
+				tasks: []*asynq.TaskInfo{
+					{ID: "xxxx", Type: "foo"},
+					{ID: "yyyy", Type: "bar"},
+					{ID: "zzzz", Type: "baz"},
+				},
+				taskTableRowIdx: 2,
+				taskID:          "yyyy", // presence of this field opens the modal
+			},
+		},
 		// TODO: Add more tests
 	}