diff --git a/optuna_dashboard/static/components/GraphHistory.tsx b/optuna_dashboard/static/components/GraphHistory.tsx
index f3d121e0..1a5447d7 100644
--- a/optuna_dashboard/static/components/GraphHistory.tsx
+++ b/optuna_dashboard/static/components/GraphHistory.tsx
@@ -187,7 +187,9 @@ const plotHistory = (
   }
 
   let filteredTrials = study.trials.filter(
-    (t) => t.state === "Complete" || t.state === "Pruned"
+    (t) =>
+      t.state === "Complete" ||
+      (t.state === "Pruned" && t.values && t.values.length > 0)
   )
   if (filterCompleteTrial) {
     filteredTrials = filteredTrials.filter((t) => t.state !== "Complete")
diff --git a/optuna_dashboard/static/components/GraphIntermediateValues.tsx b/optuna_dashboard/static/components/GraphIntermediateValues.tsx
index 227d7434..e54b601a 100644
--- a/optuna_dashboard/static/components/GraphIntermediateValues.tsx
+++ b/optuna_dashboard/static/components/GraphIntermediateValues.tsx
@@ -31,7 +31,9 @@ const plotIntermediateValue = (trials: Trial[]) => {
   }
 
   const filteredTrials = trials.filter(
-    (t) => t.state === "Complete" || t.state === "Pruned"
+    (t) =>
+      t.state === "Complete" ||
+      (t.state === "Pruned" && t.values && t.values.length > 0)
   )
   const plotData: Partial<plotly.PlotData>[] = filteredTrials.map((trial) => {
     return {
diff --git a/optuna_dashboard/static/components/GraphParallelCoordinate.tsx b/optuna_dashboard/static/components/GraphParallelCoordinate.tsx
index 9b4959ce..33c79961 100644
--- a/optuna_dashboard/static/components/GraphParallelCoordinate.tsx
+++ b/optuna_dashboard/static/components/GraphParallelCoordinate.tsx
@@ -32,7 +32,9 @@ const plotCoordinate = (trials: Trial[], objectiveId: number) => {
   }
 
   const filteredTrials = trials.filter(
-    (t) => t.state === "Complete" || t.state === "Pruned"
+    (t) =>
+      t.state === "Complete" ||
+      (t.state === "Pruned" && t.values && t.values.length > 0)
   )
 
   // Intersection param names
diff --git a/optuna_dashboard/static/components/GraphParetoFront.tsx b/optuna_dashboard/static/components/GraphParetoFront.tsx
index e0d4491b..b2d861d0 100644
--- a/optuna_dashboard/static/components/GraphParetoFront.tsx
+++ b/optuna_dashboard/static/components/GraphParetoFront.tsx
@@ -103,7 +103,7 @@ const plotParetoFront = (
     },
   }
 
-  const trials: Trial[] = study !== null ? study.trials : []
+  const trials: Trial[] = study ? study.trials : []
   const completedTrials = trials.filter((t) => t.state === "Complete")
 
   if (completedTrials.length === 0) {
diff --git a/optuna_dashboard/static/components/GraphSlice.tsx b/optuna_dashboard/static/components/GraphSlice.tsx
index a7ce3bfc..87320156 100644
--- a/optuna_dashboard/static/components/GraphSlice.tsx
+++ b/optuna_dashboard/static/components/GraphSlice.tsx
@@ -140,7 +140,8 @@ const plotSlice = (
 
   const filteredTrials = trials.filter(
     (t) =>
-      (t.state === "Complete" || t.state === "Pruned") &&
+      (t.state === "Complete" ||
+        (t.state === "Pruned" && t.values && t.values.length > 0)) &&
       t.params.find((p) => p.name == selected) !== undefined
   )