To provide a low-cost parking brake of compact structure offering excellent ease in operation.

The parking brake is structured so that the rotation of its braking surface is restrained by pressing the braking surface and composed of a rotating member coupled with a brake lever and rotatable around the axis, a pressing member to press the braking surface, grooves formed at the mutually confronting surfaces of the rotating member and pressing member and having a depth inclining in the rotational direction of the rotating member, and steel pieces inserted in the grooves in such a way as rolling freely.