An electrical outlet structure includes an electrical outlet body having four plug terminal insertion holes formed in a front surface thereof, and a blocking panel which has two plug terminal through holes, and is installed on the front surface of the electrical outlet body to block the four plug terminal insertion holes. The user may easily insert the plug into the plug terminal insertion hole installed in a diagonal direction without the user directly having to visually check a direction in which the plug terminal insertion hole of the electrical outlet body is installed, as well as select the insertion direction of the plug into the electrical outlet body as necessary, in consideration of a use state and a surrounding environment of other adjacent electrical outlet bodies.