Abstract: A power supply with a changeable plug element includes a plug housing and a plug element mounted moveably on the plug housing. The plug housing includes a front cover (1), a circuit board (2), a rear cover (4) and a pair of connecting sheets (5). The rear cover (4) and the front cover (1) engage with each other and contain the circuit board (2). The plug element includes a plug lid (6), a pair of elastic sheets (7) and a base (8) with pins. The plug lid (6) is mounted on the base (8) to form a receiving space, and the elastic sheets (7) are received in the receiving space and connect with pin wires. The plug lid (6) can insert into the plug housing and the connecting sheets (5) may engage with the elastic sheets (7). The present invention has simple structure and low cost and can be operated conveniently.