diff --git a/cpp/src/arrow/record_batch.h b/cpp/src/arrow/record_batch.h
index b03cbf2251f47..a7bfc269eb974 100644
--- a/cpp/src/arrow/record_batch.h
+++ b/cpp/src/arrow/record_batch.h
@@ -310,7 +310,8 @@ class ARROW_EXPORT RecordBatchReader {
   /// \brief Read the next record batch in the stream. Return null for batch
   /// when reaching end of stream
   ///
-  /// \param[out] batch the next loaded batch, null at end of stream
+  /// \param[out] batch the next loaded batch, null at end of stream. Return
+  /// a empty batch doesn't means the end of stream, it could be a empty batch.
   /// \return Status
   virtual Status ReadNext(std::shared_ptr<RecordBatch>* batch) = 0;