Chuck pin and disk chucking device having the same

A disk chucking device configured to couple a disk to a rotor of a motor such that the disk can be mounted and demounted, the disk chucking device comprising:

• a housing accommodating a boss being coupled with the rotor;
• a chuck pin inserted into the housing such that the chuck pin is protruded from the housing, and comprising a protruding part, which is configured to press against the disk, and a body, of which a front part is coupled to the protruding part and of which a lower surface has an inclined part formed such that the front part of the body can be rotated about the back part of the body as a pivot when pressure is applied to an upper surface of the protruding part;
• and
• an elastic body interposed between the chuck pin and the boss of the housing such that the chuck pin is elastically supported toward the outside of the housing.