Disclosed is a functional briefs for men, including: a cloth for lining including an opening part for penis for separating the penis and scrotum, the opening part for penis receiving the penis; and a containing cloth, wherein a pocket-shaped containing cloth for penis and a containing cloth for scrotum are formed in one cloth, the containing cloth including a first curved part sewed on the front part of the cloth for lining and formed by a first wrinkled part, a second curved part formed by a second wrinkled part, and a third curved part formed by a third wrinkled part, the containing cloth being connected with a front part of the cloth for lining.