To provide a men's underwear improved in air permeability of a lower section of the front body so as not to feel hot nor stuffy, and further improved so as to be convenient for urinating.

This men's underwear comprises a pants part 1 obtained by connecting a front body 3 which covers the abdomen and a back body 4 which covers the hips and a lower area of the waist at both the sides and the crotch, wherein the front body 3 has an opening 6 at a lower area of the center, and further both the sides and the lower hem of a cover fabric 7 which consists of a stretch mesh fabric in a shape of reversed triangle are sewed on the front body 3 to be attached to both the sides and the lower hem of the front body 3, respectively, so that the cover fabric covers the front area of the opening 6.