diff --git a/optuna_dashboard/ts/components/StudyDetail.tsx b/optuna_dashboard/ts/components/StudyDetail.tsx
index 33720612..08c5c08d 100644
--- a/optuna_dashboard/ts/components/StudyDetail.tsx
+++ b/optuna_dashboard/ts/components/StudyDetail.tsx
@@ -604,13 +604,14 @@ export const TrialTable: FC<{ studyDetail: StudyDetail | null }> = ({
     studyDetail?.intersection_search_space.length
   ) {
     studyDetail?.intersection_search_space.forEach((s) => {
+      const sortable = s.distribution !== "CategoricalDistribution"
       columns.push({
         field: "params",
         label: `Param ${s.name}`,
         toCellValue: (i) =>
           trials[i].params.find((p) => p.name === s.name)?.value || null,
-        sortable: true,
-        filterable: false,
+        sortable: sortable,
+        filterable: false, // TODO(yoshinobc): Support filtering by categorical parameters
         less: (firstEl, secondEl): number => {
           const firstVal = firstEl.params.find((p) => p.name === s.name)?.value
           const secondVal = secondEl.params.find(
diff --git a/typescript_tests/TrialTable.test.tsx b/typescript_tests/TrialTable.test.tsx
index 713a71d1..da783fec 100644
--- a/typescript_tests/TrialTable.test.tsx
+++ b/typescript_tests/TrialTable.test.tsx
@@ -86,13 +86,14 @@ it("Sort TrialTable by trial number", () => {
     <TrialTable studyDetail={studyDetail} />
   )
   const rows = getAllByRole("row")
+
   expect(within(rows[1]).getByText("0")).toBeTruthy()
-  expect(within(rows[3]).getByText("1")).toBeTruthy()
+  expect(within(rows[3]).getAllByText("1")[0]).toBeTruthy()
 
   fireEvent.click(getByText("Number"))
 
   const rows_updated = getAllByRole("row")
-  expect(within(rows_updated[1]).getByText("1")).toBeTruthy()
+  expect(within(rows_updated[1]).getAllByText("1")[0]).toBeTruthy()
   expect(within(rows_updated[3]).getByText("0")).toBeTruthy()
 })