diff --git a/tier4_system_msgs/msg/DiagGraphStatus.msg b/tier4_system_msgs/msg/DiagGraphStatus.msg
index 7661eda..814e279 100644
--- a/tier4_system_msgs/msg/DiagGraphStatus.msg
+++ b/tier4_system_msgs/msg/DiagGraphStatus.msg
@@ -1,5 +1,5 @@
 builtin_interfaces/Time stamp
-string name
+string id
 tier4_system_msgs/DiagNodeStatus[] nodes
 tier4_system_msgs/DiagLeafStatus[] diags
 tier4_system_msgs/DiagLinkStatus[] links
diff --git a/tier4_system_msgs/msg/DiagGraphStruct.msg b/tier4_system_msgs/msg/DiagGraphStruct.msg
index 583f5d3..9c1e700 100644
--- a/tier4_system_msgs/msg/DiagGraphStruct.msg
+++ b/tier4_system_msgs/msg/DiagGraphStruct.msg
@@ -1,5 +1,5 @@
 builtin_interfaces/Time stamp
-string name
+string id
 tier4_system_msgs/DiagNodeStruct[] nodes
 tier4_system_msgs/DiagLeafStruct[] diags
 tier4_system_msgs/DiagLinkStruct[] links