diff --git a/evaluator/perception_online_evaluator/src/perception_online_evaluator_node.cpp b/evaluator/perception_online_evaluator/src/perception_online_evaluator_node.cpp
index 46301f787193f..7d8344c24819c 100644
--- a/evaluator/perception_online_evaluator/src/perception_online_evaluator_node.cpp
+++ b/evaluator/perception_online_evaluator/src/perception_online_evaluator_node.cpp
@@ -106,19 +106,19 @@ void PerceptionOnlineEvaluatorNode::toMetricMsg(
   // min value
   metrics_msg.metric_array.emplace_back(tier4_metric_msgs::build<tier4_metric_msgs::msg::Metric>()
                                           .name(metric + "/min")
-                                          .unit("m")
+                                          .unit("")
                                           .value(std::to_string(metric_stat.min())));
 
   // max value
   metrics_msg.metric_array.emplace_back(tier4_metric_msgs::build<tier4_metric_msgs::msg::Metric>()
                                           .name(metric + "/max")
-                                          .unit("m")
+                                          .unit("")
                                           .value(std::to_string(metric_stat.max())));
 
   // mean value
   metrics_msg.metric_array.emplace_back(tier4_metric_msgs::build<tier4_metric_msgs::msg::Metric>()
                                           .name(metric + "/mean")
-                                          .unit("m")
+                                          .unit("")
                                           .value(std::to_string(metric_stat.mean())));
 }
 
@@ -126,9 +126,10 @@ void PerceptionOnlineEvaluatorNode::toMetricMsg(
   const std::string & metric, const double metric_value,
   tier4_metric_msgs::msg::MetricArray & metrics_msg) const
 {
-  metrics_msg.metric_array.emplace_back(
-    tier4_metric_msgs::build<tier4_metric_msgs::msg::Metric>().name(metric).unit("m").value(
-      std::to_string(metric_value)));
+  metrics_msg.metric_array.emplace_back(tier4_metric_msgs::build<tier4_metric_msgs::msg::Metric>()
+                                          .name(metric + "/metric_value")
+                                          .unit("")
+                                          .value(std::to_string(metric_value)));
 }
 
 void PerceptionOnlineEvaluatorNode::onObjects(const PredictedObjects::ConstSharedPtr objects_msg)