Haidomyrmex is an extinct genus of ants in the formicid subfamily Sphecomyrminae, and is one of only three genera placed in the tribe Haidomyrmecini. The genus contains three described species Haidomyrmex cerberus, Haidomyrmex scimitarus, and Haidomyrmex zigrasi. All three are known from single Late Cretaceous fossils which have been found in Asia. H. cerberus is the type species and Haidomyrmex the type genus for the tribe Haidomyrmecini.