diff --git a/src/array/fixed_size_binary/mod.rs b/src/array/fixed_size_binary/mod.rs
index 98dc365ff33..82695c437e7 100644
--- a/src/array/fixed_size_binary/mod.rs
+++ b/src/array/fixed_size_binary/mod.rs
@@ -81,9 +81,10 @@ impl FixedSizeBinaryArray {
 
     /// Returns a new null [`FixedSizeBinaryArray`].
     pub fn new_null(data_type: DataType, length: usize) -> Self {
+        let size = Self::maybe_get_size(&data_type).unwrap();
         Self::new(
             data_type,
-            Buffer::new_zeroed(length),
+            Buffer::new_zeroed(length * size),
             Some(Bitmap::new_zeroed(length)),
         )
     }
diff --git a/tests/it/array/fixed_size_binary/mod.rs b/tests/it/array/fixed_size_binary/mod.rs
index cecaf402aae..f1edb8bf76d 100644
--- a/tests/it/array/fixed_size_binary/mod.rs
+++ b/tests/it/array/fixed_size_binary/mod.rs
@@ -50,6 +50,13 @@ fn empty() {
     assert_eq!(array.validity(), None);
 }
 
+#[test]
+fn null() {
+    let array = FixedSizeBinaryArray::new_null(DataType::FixedSizeBinary(2), 2);
+    assert_eq!(array.values().len(), 4);
+    assert_eq!(array.validity().cloned(), Some([false, false].into()));
+}
+
 #[test]
 fn from_iter() {
     let iter = std::iter::repeat(vec![1u8, 2]).take(2).map(Some);