A pushbutton switch includes a pushbutton unit and a resilient member. The pushbutton unit includes a mounting seat and a pushbutton covering the mounting seat. The resilient member has a switch contactor, two resilient arms extending respectively from opposite ends of the switch contactor, two abutment segments engaging the limiting seat, and four sustainment segments extending away from the abutment segments and inclined toward the switch contactor. When the pushbutton is pressed to push the sustainment segments, the resilient arms are deformed to have a resilient force for urging the pushbutton away from the limiting seat, and to drive the switch contactor to contact and move an activator of a switch assembly.