The present invention relates to a functional rectangular panty for men which is excellent in hygiene, breathability and wearing comfort, and which can produce a healthy male beauty, has a square shape, and has a penis and a scrotum positioned inside thereof when worn, A panty body having an opening formed in a front part thereof; The panty body is disposed in a transverse direction and is made of a pliable material. Both sides of the panty body are coupled to the inner surface of the front portion of the panty body to prevent direct contact of the penis with flesh. The penis and the scrotum are separated from each other. A penis separation barrier having a penis inserted into the insertion port, the penis being lifted upward when the penis is worn; A penis frictional member which is made of a hemp material and is arranged in a longitudinal direction and which is coupled to a front part of the panty body and contacts a penis lifted upward; And a resilient connection member having one end connected to the upper portion of the panty body and the other end connected to both sides of the penis barrier rib.; 展开▼