Cantharocybe is a genus of mushroom-forming fungi in the family Hygrophoraceae. The genus was described by American mycologists Howard E. Bigelow and Alexander H. Smith in 1973. Cantharocybe contains three species: the type C. gruberi, and C. brunneovelutina from Belize, reported as new to science in 2011, and C. virosa, transferred from "Megacollybia", and found in Bangladesh and India.