diff --git a/cpp/src/arrow/python/pandas_convert.cc b/cpp/src/arrow/python/pandas_convert.cc
index 6b0e3429081..654c3921e8b 100644
--- a/cpp/src/arrow/python/pandas_convert.cc
+++ b/cpp/src/arrow/python/pandas_convert.cc
@@ -1310,7 +1310,6 @@ inline Status ConvertNulls(const ChunkedArray& data, PyObject** out_values) {
   for (int c = 0; c < data.num_chunks(); c++) {
     std::shared_ptr<Array> arr = data.chunk(c);
 
-    const bool has_nulls = data.null_count() > 0;
     for (int64_t i = 0; i < arr->length(); ++i) {
       // All values are null
       Py_INCREF(Py_None);