An electronic device includes a housing, a circuit board and a volume button. The housing defining a slot, and includes a fixing block. The fixing block is formed on an inner wall of the housing and positioned adjacent to one end of the slot. A through hole is formed in the fixing block. The circuit board received in the housing includes a volume control module and a mute control module positioned adjacent to the slot. The volume button is movably positioned in the slot and exposed out of the housing. The volume button includes a volume increasing portion and the volume decreasing portion. The volume increasing portion and the volume decreasing portion can be pushed on the volume control module. One end of the volume button passes through the through hole and is capable of triggering the mute control module.