diff --git a/daemon/mgr/cri.go b/daemon/mgr/cri.go
index c16b621b8..6afdc619b 100644
--- a/daemon/mgr/cri.go
+++ b/daemon/mgr/cri.go
@@ -189,7 +189,30 @@ func (c *CriManager) PodSandboxStatus(ctx context.Context, r *runtime.PodSandbox
 
 // ListPodSandbox returns a list of Sandbox.
 func (c *CriManager) ListPodSandbox(ctx context.Context, r *runtime.ListPodSandboxRequest) (*runtime.ListPodSandboxResponse, error) {
-	return nil, fmt.Errorf("ListPodSandbox Not Implemented Yet")
+	opts := &ContainerListOption{All: true}
+	filter := func(c *ContainerMeta) bool {
+		return c.Config.Labels[containerTypeLabelKey] == containerTypeLabelSandbox
+	}
+
+	// Filter *only* (sandbox) containers.
+	sandboxList, err := c.ContainerMgr.List(ctx, filter, opts)
+	if err != nil {
+		return nil, fmt.Errorf("failed to list sandbox: %v", err)
+	}
+
+	sandboxes := make([]*runtime.PodSandbox, 0, len(sandboxList))
+	for _, s := range sandboxList {
+		sandbox, err := toCriSandbox(s)
+		if err != nil {
+			// TODO: log an error message?
+			continue
+		}
+		sandboxes = append(sandboxes, sandbox)
+	}
+
+	result := filterCRISandboxes(sandboxes, r.GetFilter())
+
+	return &runtime.ListPodSandboxResponse{Items: result}, nil
 }
 
 // CreateContainer creates a new container in the given PodSandbox.
diff --git a/daemon/mgr/cri_test.go b/daemon/mgr/cri_test.go
index 756cf2c5b..e7bb4d563 100644
--- a/daemon/mgr/cri_test.go
+++ b/daemon/mgr/cri_test.go
@@ -66,6 +66,21 @@ func TestSandboxNameRoundTrip(t *testing.T) {
 	assert.Equal(t, config.Metadata, actualMetadata)
 }
 
+func TestToCriSandboxState(t *testing.T) {
+	testCases := []struct {
+		input    apitypes.Status
+		expected runtime.PodSandboxState
+	}{
+		{input: apitypes.StatusRunning, expected: runtime.PodSandboxState_SANDBOX_READY},
+		{input: apitypes.StatusExited, expected: runtime.PodSandboxState_SANDBOX_NOTREADY},
+	}
+
+	for _, test := range testCases {
+		actual := toCriSandboxState(test.input)
+		assert.Equal(t, test.expected, actual)
+	}
+}
+
 // Container related unit tests.
 
 func TestContainerNameRoundTrip(t *testing.T) {
@@ -85,7 +100,7 @@ func TestContainerNameRoundTrip(t *testing.T) {
 	assert.Equal(t, config.Metadata, actualMetadata)
 }
 
-func TestConvertPouchStatusToCriContainerState(t *testing.T) {
+func TestToCriContainerState(t *testing.T) {
 	testCases := []struct {
 		input    apitypes.Status
 		expected runtime.ContainerState
diff --git a/daemon/mgr/cri_utils.go b/daemon/mgr/cri_utils.go
index 1d41642e7..f042b2903 100644
--- a/daemon/mgr/cri_utils.go
+++ b/daemon/mgr/cri_utils.go
@@ -134,6 +134,64 @@ func makeSandboxPouchConfig(config *runtime.PodSandboxConfig, image string) (*ap
 	return createConfig, nil
 }
 
+func toCriSandboxState(status apitypes.Status) runtime.PodSandboxState {
+	switch status {
+	case apitypes.StatusRunning:
+		return runtime.PodSandboxState_SANDBOX_READY
+	default:
+		return runtime.PodSandboxState_SANDBOX_NOTREADY
+	}
+}
+
+func toCriSandbox(c *ContainerMeta) (*runtime.PodSandbox, error) {
+	state := toCriSandboxState(c.State.Status)
+	metadata, err := parseSandboxName(c.Name)
+	if err != nil {
+		return nil, err
+	}
+	labels, annotations := extractLabels(c.Config.Labels)
+	return &runtime.PodSandbox{
+		Id:       c.ID,
+		Metadata: metadata,
+		State:    state,
+		// TODO: fill "CreatedAt" when it is appropriate.
+		Labels:      labels,
+		Annotations: annotations,
+	}, nil
+}
+
+func filterCRISandboxes(sandboxes []*runtime.PodSandbox, filter *runtime.PodSandboxFilter) []*runtime.PodSandbox {
+	if filter == nil {
+		return sandboxes
+	}
+
+	filtered := []*runtime.PodSandbox{}
+	for _, s := range sandboxes {
+		if filter.GetId() != "" && filter.GetId() != s.Id {
+			continue
+		}
+		if filter.GetState() != nil && filter.GetState().GetState() != s.State {
+			continue
+		}
+		if filter.GetLabelSelector() != nil {
+			match := true
+			for k, v := range filter.GetLabelSelector() {
+				value, ok := s.Labels[k]
+				if !ok || v != value {
+					match = false
+					break
+				}
+			}
+			if !match {
+				continue
+			}
+		}
+		filtered = append(filtered, s)
+	}
+
+	return filtered
+}
+
 // Container related tool functions.
 
 func makeContainerName(s *runtime.PodSandboxConfig, c *runtime.ContainerConfig) string {