Abstract: A rotatable electric plug has a bottom case, a rotatable brace, a plug head, a limit cover and a top cover. The rotatable brace is rotatably mounted in the bottom case and has a top surface and two connectors being mounted on the top surface of the rotatable brace. The plug head is detachably mounted on the bottom case and is connected with the rotatable brace. Two pins of the plug head is electronically connected to the connectors respectively. The limit cover is mounted in the bottom case to position the rotatable brace. The top cover is mounted on the bottom case to hold the rotatable brace and the limit cover inside the bottom case.