A button fixing mechanism for fixing a button (50) to a base (20) of an electronic device includes a top panel (30) of the base, a shelf (40) attached to the top panel, and a pair of resilient members (60). The button includes a pair of shafts (53) extending outwardly from sidewalls (51) thereof. The shelf includes an oblong slot (42) defined therein, and a pair of tabs (422) extending beside the oblong slot and each defining a pivoting hole (423) therein. The button is extended through the oblong slot, with the shafts received in the pivoting holes of tabs. The resilient members are separately attached to the top panel and engage two ends of the button.