Odontolabis dalmani is a species of beetles belonging to the family Lucanidae.

The large mandible of males are used to wrestle each other for mating or food.

Adults feed on tree sap and decaying fruits.

This species can be found in Tenasserim Island, Malayan Peninsula, Borneo, Sumatra and Java.

The species is named to honour the Swedish entomologist Johan Wilhelm Dalman.