an external operation handle device for a circuit breaker includes a rotary handle equipped with a handle lock lever , a drive mechanism linking the rotary handle and the locker handle of the circuit breaker , and a door lock lever for interlocking between the rotary handle and a door of the board . by operating the rotary handle , the circuit breaker can be turned to an on or off position , and the door is unlocked at an open position . the handle lock lever is slidably disposed on the rotary handle to be anchored and held at a pulled out position in a condition where the rotary handle at the open position unlocks the door of the board , and the door lock lever linked to the rotary handle is cramped and held at the unlock position in a condition where the rotary handle is at the open position .