A skate spinner comprises a platform configured for a user's foot to be placed thereon, and a support unit forming a lower part of the platform contacting a ground surface and having a curved protruded surface starting from a front end to a rear end thereof. The support unit includes plates each having a thickness equal to at least a thickness of an ice-skate blade and being aligned in a lateral direction of the skate spinner at a predetermined distance. An overall bottom surface of the plates contacting the ground surface has a spherical surface outline.