Eotomistoma is a dubious genus of crocodyliform from the Lower Cretaceous of China.

Eotomistoma was named by Chung-Chien Young in 1964 based on two pieces of the snout.

However, other researchers, such as Eric Buffetaut, were skeptical of Young's interpretation, and in 1981 Denise Sigogneau-Russell re-studied it and determined the specimen was a chimera of a crocodylian and a choristodere.

The remaining snout fragment, still the holotype of Eotomistoma, is now considered to be an indeterminate crocodyliform.

It was a contemporary of the choristodere Ikechosaurus and the crocodyliforms Theriosuchus and Shantungosuchus.