A mounting apparatus is used to mount a fan having a bottom panel with a mounting hole defined therein. The mounting apparatus is configured to support the bottom panel on a top side thereof. The board forms a clip on the top side of the board, and defines a through hole adjacent the clip. The clip includes a elastic shank standing on the top side of the board, a flange formed on a top end of the shank and suspended over the shank, and a driving pole extending downwards from the shank and through the through hole of the board to have a driving end of the driving pole located below the board adapted to bend the shank. The clip is inserted in the mounting hole of the bottom panel with the flange engaging on a top surface of the bottom panel. The bottom panel is sandwiched between the flange and the top side of the board. The driving end of the driving pole is manually bendable to disengage the flange of the clip from the top surface of the bottom panel.