diff --git a/internal/provider/data_source_mackerel_role_metadata.go b/internal/provider/data_source_mackerel_role_metadata.go
new file mode 100644
index 0000000..b57934e
--- /dev/null
+++ b/internal/provider/data_source_mackerel_role_metadata.go
@@ -0,0 +1,89 @@
+package provider
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-framework-jsontypes/jsontypes"
+	"github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/schema/validator"
+	"github.com/mackerelio-labs/terraform-provider-mackerel/internal/mackerel"
+)
+
+var (
+	_ datasource.DataSourceWithConfigure = (*mackerelRoleMetadataDataSource)(nil)
+)
+
+func NewMackerelRoleMetadataDataSource() datasource.DataSource {
+	return &mackerelRoleMetadataDataSource{}
+}
+
+type mackerelRoleMetadataDataSource struct {
+	Client *mackerel.Client
+}
+
+func (d *mackerelRoleMetadataDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
+	resp.TypeName = req.ProviderTypeName + "_role_metadata"
+}
+
+func (d *mackerelRoleMetadataDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
+	resp.Schema = schema.Schema{
+		Description: "This data source accesses to details of a specific Role Metadata.",
+		Attributes: map[string]schema.Attribute{
+			"id": schema.StringAttribute{
+				Computed: true,
+			},
+			"service": schema.StringAttribute{
+				Description: "The name of the service.",
+				Required:    true,
+				Validators:  []validator.String{mackerel.ServiceNameValidator()},
+			},
+			"role": schema.StringAttribute{
+				Description: "The name of the role.",
+				Required:    true,
+				Validators:  []validator.String{mackerel.RoleNameValidator()},
+			},
+			"namespace": schema.StringAttribute{
+				Description: "The identifier for the metadata.",
+				Required:    true,
+			},
+			"metadata_json": schema.StringAttribute{
+				Description: "Arbitrary JSON data for the role.",
+				Computed:    true,
+				CustomType:  jsontypes.NormalizedType{},
+			},
+		},
+	}
+}
+
+func (d *mackerelRoleMetadataDataSource) Configure(ctx context.Context, req datasource.ConfigureRequest, resp *datasource.ConfigureResponse) {
+	client, diags := retrieveClient(ctx, req.ProviderData)
+	resp.Diagnostics.Append(diags...)
+	if diags.HasError() {
+		return
+	}
+	d.Client = client
+}
+
+func (d *mackerelRoleMetadataDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
+	var config mackerel.RoleMetadataModel
+	resp.Diagnostics.Append(req.Config.Get(ctx, &config)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	serviceName := config.ServiceName.ValueString()
+	roleName := config.RoleName.ValueString()
+	namespace := config.Namespace.ValueString()
+	data, err := mackerel.ReadRoleMetadata(ctx, d.Client, serviceName, roleName, namespace)
+	if err != nil {
+		resp.Diagnostics.AddError(
+			fmt.Sprintf("Unable to read Role Metadata: service=%s role=%s namespace=%s", serviceName, roleName, namespace),
+			err.Error(),
+		)
+		return
+	}
+
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}
diff --git a/internal/provider/data_source_mackerel_role_metadata_test.go b/internal/provider/data_source_mackerel_role_metadata_test.go
new file mode 100644
index 0000000..8c3aee7
--- /dev/null
+++ b/internal/provider/data_source_mackerel_role_metadata_test.go
@@ -0,0 +1,25 @@
+package provider_test
+
+import (
+	"context"
+	"testing"
+
+	fwdatasource "github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/mackerelio-labs/terraform-provider-mackerel/internal/provider"
+)
+
+func Test_MackerelRoleMetadataDataSource_schema(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+	req := fwdatasource.SchemaRequest{}
+	resp := fwdatasource.SchemaResponse{}
+	provider.NewMackerelRoleMetadataDataSource().Schema(ctx, req, &resp)
+	if resp.Diagnostics.HasError() {
+		t.Fatalf("schema diagnostics: %+v", resp.Diagnostics)
+	}
+
+	if diags := resp.Schema.ValidateImplementation(ctx); diags.HasError() {
+		t.Fatalf("schema validation diagnostics: %+v", diags)
+	}
+}
diff --git a/internal/provider/provider.go b/internal/provider/provider.go
index 0ba4bc1..55d61c7 100644
--- a/internal/provider/provider.go
+++ b/internal/provider/provider.go
@@ -92,6 +92,7 @@ func (m *mackerelProvider) Resources(context.Context) []func() resource.Resource
 func (m *mackerelProvider) DataSources(context.Context) []func() datasource.DataSource {
 	return []func() datasource.DataSource{
 		NewMackerelNotificationGroupDataSource,
+		NewMackerelRoleMetadataDataSource,
 		NewMackerelServiceDataSource,
 		NewMackerelServiceMetadataDataSource,
 		NewMackerelServiceMetricNamesDataSource,
diff --git a/mackerel/provider.go b/mackerel/provider.go
index 0abc2b5..0b74c95 100644
--- a/mackerel/provider.go
+++ b/mackerel/provider.go
@@ -88,6 +88,7 @@ func protoV5ProviderServer(provider *schema.Provider) tfprotov5.ProviderServer {
 
 		// Data Sources
 		delete(provider.DataSourcesMap, "mackerel_notification_group")
+		delete(provider.DataSourcesMap, "mackerel_role_metadata")
 		delete(provider.DataSourcesMap, "mackerel_service")
 		delete(provider.DataSourcesMap, "mackerel_service_metadata")
 		delete(provider.DataSourcesMap, "mackerel_service_metric_names")