Rhacophorus tunkui is a disputed species of frog in the moss frog family (Rhacophoridae). It is known only from the southern and southeastern parts of Peninsular Malaysia, but might be more widespread. It is often treated as a junior synonym of R prominanus (Malayan flying frog), but this seems to be premature; actually, it appears to be a parapatric cryptic sister species. R. dulitensis from Borneo and Sumatra is probably another close relative.