A front wheel brake device for forklifts is used in applying brake to a front wheel attached to opposite lateral bottom sides of a mast assembly. The device includes a support bracket provided at the bottom sides of the mast assembly, a brake housing fixed to the support bracket and received within the front wheel, a wheel hub fixedly secured to the front wheel, an axle shaft rotatably provided within the brake housing and engaged with a shaft portion of the wheel hub for unitary rotation with the front wheel, brake discs axially movably fitted to the axle shaft for unitary rotation therewith, friction plates alternately arranged between the brake discs and fitted to the brake housing for movement in an axial direction of the axle shaft, and a piston provided within the brake housing for, when operated, pressing the friction plates against the brake discs.