A turntable device and a disk driving device having the same are disclosed. A turntable device for securing a disk includes: a cone part, which receives the disk in a detachable manner; a base, on which the disk may be mounted, and on which a boss is formed; and a yoke, which is coupled to the boss, and which supports the cone part in a manner such that the cone part is separated from the boss and is capable of sliding. This turntable device can improve alignment between the rotation centers of the motor and the disk, even in high-speed rotations.

 
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