A movable contactor assembly for a current limiting type circuit breaker comprises a movable contactor having a pair of curved protrusions having cam profiles, a shaft to rotatably support the movable contactor located therein, a pair of contact levers each having a contact surface contactable with the curved protrusion of the movable contactor and a pair of spring supporting recess portions and a pair of springs each having both end portions supported by the spring supporting recess portions, the pair of springs applying an elastic force as contact pressure for maintaining a contact state between the movable contactor and the stationary contactor when the movable contactor is located at the first position, and applying the elastic force in a direction to separate the movable contactor from the stationary contactor when the movable contactor is moved over a dead point while rotating toward the second position.