毛癣菌属（学名：Trichophyton）是子囊菌门下的一种真菌。其菌丝可以产生光滑直筒状的大分生孢子（macroconidia）与许多小分生孢子（microconidia）。其中大分生孢子直接在菌丝侧向生长，呈棒状或纺绽状，大小约为4-8乘8-50微米。在大部分该属物种中，大分生孢子少见或不存在。小分生孢子呈圆形、梨形、棒状或不规则状，大小约为2-3乘2-4微米。毛癣菌属侵害人类的皮肤、毛囊及指甲造成皮肤感染。

Trichophyton is a genus of fungi, which includes the parasitic varieties that cause tinea, including athlete's foot, ringworm, jock itch, and similar infections of the nail, beard, skin and scalp. Trichophyton fungi are molds characterized by the development of both smooth-walled macro- and microconidia. Macroconidia are mostly borne laterally directly on the hyphae or on short pedicels, and are thin- or thick-walled, clavate to fusiform, and range from 4 to 8 by 8 to 50 μm in size. Macroconidia are few or absent in many species. Microconidia are spherical, pyriform to clavate or of irregular shape, and range from 2 to 3 by 2 to 4 μm in size.