Smith's wrinkled frog (Alcalus tasanae), commonly known as Tasan eastern frog, Tasan frog, or Tha san frog,) is a species of frog in the family Dicroglossidae. It is found in western and southern Thailand; its range likely extends to Myanmar but it has not yet been recorded there. Its natural habitats are primary rainforests near streams. It is threatened by habitat loss.