Abstract: A mounting apparatus includes a lock member (20), a support panel (30), and a securing panel (40). The support panel includes a main wall (32). First and second lock plates (33, 34) and catches (35) are arranged on the main wall. The securing panel includes a base board (41) and a flange (42). Catch holes (49) are defined in the base board, the catch holes engagingly receiving the catches. Two openings (45) are defined between the base board and the flange. The lock member includes two latches (22) engaging in the openings. First and second cutouts (23, 24) are defined respectively in opposite sides of the lock member. The first and second lock plates of the support panel are passed through the first and second cutouts of the lock member, thereby enabling the lock member to be slidably retained on the main wall by the first and second lock plates.