A support mechanism includes a base assembly and a hinge assembly. The base assembly includes a first cover and a second cover attached to the first cover. The first cover forms two first locking members and the second cover forms two restriction members. The hinge assembly includes a bracket and two pivot units rotatably connected to the bracket. The bracket includes a fixing portion and two connecting portions extending from opposite sides of the fixing portion. The first locking members are latched with the fixing portion of the bracket, and the restriction members engage the first locking members to prevent the first locking members from moving.