To provide a leaf spring electromagnetic brake device which can be inexpensively formed by directly using an existing electromagnetic brake and adding a simple movable connecting part thereto, hardly receive influences of accuracy of parts and assembly, aged deterioration of a leaf spring or deviation of a gap and can maintain a stable operation for a long period of time.

The leaf spring electromagnetic brake device 1 comprises a brake main body 2 by the leaf spring electromagnetic brake, a rotating member 4 mounted on an axis of the brake main body 2, a stationary member 5 for pivotally supporting the rotating member 4 so as to freely rotate and stop rotation by a braking operation of the brake main body 2 and the movable connecting part 6 using a spring member for connecting the stationary member 5 to a stator 9 of the brake main body 2.