The Indonesian tomb bat (Taphozous achates) is a species of sac-winged bat in the family Emballonuridae.

The Indonesian tomb bat was described as a new species in 1915 by British mammalogist Oldfield Thomas.

The holotype had been collected on the Indonesian island of Savu in 1896 by British naturalist Alfred Hart Everett.

[4] In many characteristics, it is similar to the black-bearded tomb bat, though it can be differentiated by its conspicuously larger skull.

Individuals have a forearm length of approximately 62 mm (2.4 in).