The leaf muntjac, leaf deer or Putao muntjac is a small species of muntjac. It was documented in 1997 by biologist Alan Rabinowitz during his field study in the isolated Nogmung Township in Myanmar. Rabinowitz discovered the species by examining the small carcass of a deer that he initially believed was the juvenile of another species; however, it proved to be the carcass of an adult female. He managed to obtain specimens, from which DNA analysis revealed a new cervid species. Local hunters knew of the species and called it the leaf deer because its body could be completely wrapped by a single large leaf. It is found in Myanmar and India.

As with other muntjacs, it is small, only standing 50cm tall at the shoulder. Unlike other muntjac species, both males and females have canine tusks.

They are little studied, but thought to behave in a similar way to other muntjac species, though little study has been done on this species (they are also listed as data deficient in terms of their status – but it seems likely that they are not common).