diff --git a/mmcv/runner/hooks/evaluation.py b/mmcv/runner/hooks/evaluation.py
index ad4b7e3ee..11bc2ddaf 100644
--- a/mmcv/runner/hooks/evaluation.py
+++ b/mmcv/runner/hooks/evaluation.py
@@ -23,10 +23,10 @@ class EvalHook(Hook):
     Args:
         dataloader (DataLoader): A PyTorch dataloader, whose dataset has
             implemented ``evaluate`` function.
-        start (int | None, optional): Evaluation starting epoch. It enables
-            evaluation before the training starts if ``start`` <= the resuming
-            epoch. If None, whether to evaluate is merely decided by
-            ``interval``. Default: None.
+        start (int | None, optional): Evaluation starting epoch or iteration.
+            It enables evaluation before the training starts if ``start`` <=
+            the resuming epoch or iteration. If None, whether to evaluate is
+            merely decided by ``interval``. Default: None.
         interval (int): Evaluation interval. Default: 1.
         by_epoch (bool): Determine perform evaluation by epoch or by iteration.
             If set to True, it will perform by epoch. Otherwise, by iteration.