Idiommata scintillans is a species of mygalomorph spider in the Barychelidae family. It is endemic to Australia. It was described in 1918 by Australian arachnologists William Joseph Rainbow and Robert Henry Pulleine.
The species occurs in South Australia in open scrub and woodland habitats. The type locality is Black Hill, in the Mount Lofty Ranges, near Adelaide.
The spiders are fossorial, terrestrial predators.