A safety socket of the present invention has one or several groups of socket holes, lock mechanisms, and release mechanisms. Plug can be inserted into the socket holes. The lock mechanism can engage the plug for preventing unexpected removal of the plug. The release mechanism is used for operating the lock mechanism for releasing the plug. The release mechanism has a button which is arranged at aside of the socket holes. Thus, the button would not be hidden by the plug. User can approach to the button easily. Operation condition of the safety socket is then facilitated.