To provide a wheel support device suppressing degradation of comfortableness of a vehicle.

The wheel support device 200 comprises springs 302, 304 mounted to an in-wheel motor 70 and extended/contracted to damp vibration of a motor-driven wheel 100 and the in-wheel motor 70; knuckles 180 mounted to the springs 302, 304 to rotatably support the motor-driven wheel 100; a center part 306 of a dynamic mass damper mechanism 300 vibrated together with the in-wheel motor 70 by the force received from a road surface when a vehicle travels; an upper part 310 abutting on the center part 306 at a predetermined part to regulate the vibration of the in-wheel motor 70; and cushioning members 322, 324 provided at parts corresponding to predetermined parts on which the center part 306 or the upper part 310 abuts.