An electronic device includes a housing and a button. The housing defines a through hole. The sidewall of the through hole defines a pair of positioning holes. The button includes a frame, a sliding bar assembly, an elastic conductive member, and a pressing member. The sliding bar assembly is received in the frame with two external ends respectively received in the positioning holes to cause the frame to be received in the through hole. The elastic conductive member is fixed in the housing. The pressing member hooks the frame and extends through the frame to resist the sliding bar assembly. When the pressing member is depressed, the pressing member resists the sliding bar assembly to cause the external ends to move out of the positioning holes. Further depress on the pressing member causes the frame to press the elastic conductive member to actuate the button.