The invention provides a loop wheel machine for elevators, the brake of which is adequate for situation of braking in need of two sets of braking means and the maintain and repair is easy. The loop wheel machine for elevators is constituted by an electric motor (1), a sheave (3), a brake (6), and rotation detecting means (7), equipped one side (2) of an output shaft of said electric motor with a sheave, and equipped the other side (4) with a retarder and a rotation detecting means. A brake drum (5) in which said retarder is combined with the other side of an output shaft of an electric motor.It comprises a braking addition means (14a,14b) which presses this brake drum and adds braking, and a braking release means (15a,15b) to resist this press and to cancel braking. The said braking addition means and the braking release means are respectively provided with two sets and arranged with said rotation detecting means on the said brake drum opposite to the motor.