Martens's warbler (Phylloscopus omeiensis)
 also known as Omei warbler or Emei Shan warbler

Martens's warbler (Phylloscopus omeiensis), also known as Omei warbler or Emei Shan warbler, is a species of Old World warbler in the family Phylloscopidae.
The bird is found in China and Myanmar.

Leaf warblers were formerly included in the Old World warbler family but are now considered to belong to the family Phylloscopidae, introduced in 2006.
The name Phylloscopus combines the Ancient Greek phullon meaning "leaf" and skopos meaning "seeker" (from skopeo, "to watch").