A computer enclosure includes a bracket and a locking member. The bracket includes a side plate defining a slide slot. A first pair of positioning mechanisms and a second pair of positioning mechanisms are located on opposite sides of the slide slot. The locking member is configured for securing a disk drive in the bracket and includes a first pair of locking portions and a second pair of locking portions. The second pair of locking portions are engaged with the second pair of positioning mechanisms. The first pair of locking portions are resiliently deformable between a first state, in which the first pair of locking portions are engaged with the first pair of positioning mechanisms, and a second state, in which the first pair of locking portions are deformed in opposite directions and disengaged from the first pair of positioning mechanisms.