diff --git a/.changeset/seven-onions-explain.md b/.changeset/seven-onions-explain.md
new file mode 100644
index 000000000..afefce439
--- /dev/null
+++ b/.changeset/seven-onions-explain.md
@@ -0,0 +1,5 @@
+---
+"@nextui-org/theme": patch
+---
+
+fixed the issue of double scrollbar in modal with inside `scrollBehavior` (#3942)
diff --git a/packages/core/theme/src/components/modal.ts b/packages/core/theme/src/components/modal.ts
index 94c74be5c..1fbc9683c 100644
--- a/packages/core/theme/src/components/modal.ts
+++ b/packages/core/theme/src/components/modal.ts
@@ -157,7 +157,7 @@ const modal = tv({
         base: "overflow-y-hidden",
       },
       inside: {
-        base: "max-h-[calc(100%_-_7.5rem)]",
+        base: "max-h-[calc(100%_-_8rem)]",
         body: "overflow-y-auto",
       },
       outside: {