A charger for charging an electronic device includes a base, a connector for connecting to the electronic device, and a pop-up mechanism. The pop-up mechanism includes a restricting unit, a pushing pillar and a return structure. The restricting unit includes a restricting sidewall and a bottom sidewall. The pushing pillar is connected to the bottom sidewall via a spring. The pushing pillar includes a resilient engaging arm. The pushing pillar is urged by the spring to an uppermost position where a top of the resilient engaging arm is located above the return structure. When the pushing pillar is pressed downwards, the resilient engaging arm slides in a positioning cutout of the return structure to hold the pushing pillar in a lower position. When the pushing pillar is further pressed downwards, the resilient engaging arm escapes from the positioning cutout to drives the pushing pillar returns to the uppermost position.