A power button module includes a pressing member, a printed circuited board, a supporting member and a bottom cover. The supporting member defines a receiving hole therein and includes a mounting portion. The mounting portion includes a base body, a mounting section and a plurality of resilient arms interconnecting the base body and the mounting section, the pressing member is partially received in the receiving hole and fixed to the mounting section, the printed circuit board partially extends through the mounting section and connects with the pressing member. The printed circuit board comprises a contacting portion away from the pressing member. The bottom cover is fixed to the supporting member and receives the mounting portion. The bottom cover comprises an electrical connecting portion spaced from the contacting portion. The present invention further discloses an electronic device using the power button module.