A computer enclosure includes a base (10), a hood (40), a pair of rails (80), and a pair of locking devices (60). The base includes a bottom plate (12) and a pair of side plates (14, 16). A pair of slideways (24) is defined in the side plates. The hood includes a top cover (42) and a bezel (44) perpendicular to the top cover. A pair of pivot rods (46) extends inwardly from opposite sides of the bezel. Each rail includes a sliding part (82) and a pivoting part (84). The sliding parts are slidably received in the slideways. Each pivoting part defines a pivoting hole (92) therein for receiving a corresponding pivot rod. The locking devices lock the hood to the base.