Computer housing

A fastening mechanism includes a mounting seat formed with a mounting hole that extends from a first surface, which is formed with an engaging post extending through a through hole in the frame body and into a fastening hole in a peripheral device, through a second surface opposite to the first surface. An engaging unit includes an operating member disposed outwardly of the second surface, and an engaging member connected to the operating member and disposed outwardly of the first surface. The operating member is operable so as to enable the engaging member to rotate about a central axis of the mounting hole from a disengaged position, where the engaging member disengages an anchoring member on the frame body, to an engaged position, where the engaging member engages the anchoring member on the frame body such that the mounting seat is fastened securely to the frame body.