Abstract: A fastener for securing computer storage device is revealed. The fastener is arranged at a housing of computers and is hooked with a sliding member of a storage device so as to secure the storage device. The fastener includes a rotating shaft, a rotating fastening member arranged above the rotating shaft, an elastic element whose two ends are respectively arranged at the housing and the rotating fastening member, and a hook member disposed on the sliding member and hooked with the rotating fastening member. By the rotating fastening member and the hook member hooked with each other, the storage device is secured in the housing automatically and the convenience of assembling is enhanced. Moreover, an action force of the rotating fastening member on the hook member hooked is increased by the elastic member so as to reduce the releasing of the hooked rotating fastening member from the hook member.