diff --git a/packages/solidstart/src/server/withServerActionInstrumentation.ts b/packages/solidstart/src/server/withServerActionInstrumentation.ts
index 785ab1432f91..def7b1367962 100644
--- a/packages/solidstart/src/server/withServerActionInstrumentation.ts
+++ b/packages/solidstart/src/server/withServerActionInstrumentation.ts
@@ -1,6 +1,6 @@
 import { handleCallbackErrors, SPAN_STATUS_ERROR } from '@sentry/core';
 import { flushIfServerless } from '@sentry/core/server';
-import { captureException, getActiveSpan, spanToJSON, startSpan } from '@sentry/node';
+import { captureException, getActiveSpan, getRootSpan, spanToJSON, startSpan } from '@sentry/node';
 import { isRedirect } from './utils';
 import {
   SENTRY_SEGMENT_NAME_SOURCE,
@@ -25,7 +25,9 @@ export async function withServerActionInstrumentation<A extends (...args: unknow
   const activeSpan = getActiveSpan();
 
   if (activeSpan) {
-    const spanData = spanToJSON(activeSpan).attributes;
+    // The request attributes live on the root `http.server` span. The active span can be a child of
+    // it, e.g. the Nitro route handler span.
+    const spanData = spanToJSON(getRootSpan(activeSpan)).attributes;
 
     // In solid start, server function calls are made to `/_server` which doesn't tell us
     // a lot. We rewrite the span's route to be that of the sever action name but only
diff --git a/packages/solidstart/test/server/withServerActionInstrumentation.test.ts b/packages/solidstart/test/server/withServerActionInstrumentation.test.ts
index 1a908c0908b9..91709fd04ce8 100644
--- a/packages/solidstart/test/server/withServerActionInstrumentation.test.ts
+++ b/packages/solidstart/test/server/withServerActionInstrumentation.test.ts
@@ -169,6 +169,37 @@ describe('withServerActionInstrumentation', () => {
     expect(mockSpanSetAttribute).to.toHaveBeenCalledWith(SENTRY_SEGMENT_NAME_SOURCE, 'route');
   });
 
+  it('sets a server action name on the root span when the active span is a child span', async () => {
+    setCurrentClient(createMockNodeClient());
+
+    const rootSpan = SentryCore.startInactiveSpan({
+      name: 'POST',
+      parentSpan: null,
+      attributes: {
+        'url.path': '/_server',
+        'http.request.method': 'POST',
+        [SENTRY_OP]: 'http.server',
+      },
+    });
+    const handlerSpan = SentryCore.startInactiveSpan({
+      name: 'POST /**',
+      parentSpan: rootSpan,
+      attributes: { [SENTRY_OP]: 'handler' },
+    });
+    mockGetActiveSpan.mockReturnValue(handlerSpan);
+
+    await serverActionGetPrefecture();
+
+    expect(spanToJSON(rootSpan)).toMatchObject({
+      name: 'POST getPrefecture',
+      attributes: expect.objectContaining({
+        'http.route': 'getPrefecture',
+        [SENTRY_SEGMENT_NAME_SOURCE]: 'route',
+      }),
+    });
+    expect(spanToJSON(handlerSpan).name).toBe('POST /**');
+  });
+
   it('does not set a server action name if the active span had a non `/_server` `url.path`', async () => {
     const span = new SentryCore.SentrySpan();
     span.setAttribute('url.path', '/users/5');