A magnetic trip device for a circuit breaker, the magnetic trip device comprising: an actuator coil part that has a plunger configured to move to an advanced position or a retracted position according to the magnetization or demagnetization of a coil; an output plate that is rotatably provided on the movement path of the plunger to rotate in a first direction by the pressing of the plunger; a micro switch that has an operation lever portion protruding outwardly and is configured to output an electrical signal indicating a state of the circuit breaker according to whether or not the operation lever portion is pressed; a switch driving lever mechanism (26, 27) that is configured to rotate to a first position for pressing the operation lever portion or a second position for releasing the operation lever portion so as to open or close the micro switch; a driving lever bias spring that is provided at a predetermined position to elastically bias the switch driving lever mechanism (26, 27) to rotate to the second position; an automatic reset mechanism that is configured to press the plunger of the actuator coil part to the retracted position in connection with a main switching shaft of the circuit breaker subsequent to a trip operation; and a driving lever latch that is configured to rotate to a restraining position for preventing the switch driving lever mechanism (26, 27) from rotating to the first position so as to allow the micro switch to maintain a trip indicating state subsequent to a trip operation even when the plunger is moved to the retracted position by the automatic reset mechanism, and a release position for allowing the switch driving lever mechanism (26, 27) to rotate to the first position, and the driving lever latch is provided adjacent to the switch driving lever mechanism (26, 27), characterized in that the driving lever latch comprises: a rotating shaft portion; a hook portion that extends from the rotating shaft portion toward the switch driving lever mechanism (26, 27) to restrain the switch driving lever mechanism (26, 27); and a release driving force receiving portion that extends from the rotating shaft portion to an opposite side of the hook portion to be brought into contact with a manual reset lever, wherein the manual reset lever comprises a pressing protrusion portion that is configured to press the release driving force receiving portion to rotate the driving lever latch to the release position. an actuator coil part that has a plunger configured to move to an advanced position or a retracted position according to the magnetization or demagnetization of a coil; an output plate that is rotatably provided on the movement path of the plunger to rotate in a first direction by the pressing of the plunger; a micro switch that has an operation lever portion protruding outwardly and is configured to output an electrical signal indicating a state of the circuit breaker according to whether or not the operation lever portion is pressed; a switch driving lever mechanism (26, 27) that is configured to rotate to a first position for pressing the operation lever portion or a second position for releasing the operation lever portion so as to open or close the micro switch; a driving lever bias spring that is provided at a predetermined position to elastically bias the switch driving lever mechanism (26, 27) to rotate to the second position; an automatic reset mechanism that is configured to press the plunger of the actuator coil part to the retracted position in connection with a main switching shaft of the circuit breaker subsequent to a trip operation; and a driving lever latch that is configured to rotate to a restraining position for preventing the switch driving lever mechanism (26, 27) from rotating to the first position so as to allow the micro switch to maintain a trip indicating state subsequent to a trip operation even when the plunger is moved to the retracted position by the automatic reset mechanism, and a release position for allowing the switch driving lever mechanism (26, 27) to rotate to the first position, and the driving lever latch is provided adjacent to the switch driving lever mechanism (26, 27), characterized in that the driving lever latch comprises: a rotating shaft portion; a hook portion that extends from the rotating shaft portion toward the switch driving lever mechanism (26, 27) to restrain the switch driving lever mechanism (26, 27); and a release driving force receiving portion that extends from the rotating shaft portion to an opposite side of the hook portion to be brought into contact with a manual reset lever, wherein the manual reset lever comprises a pressing protrusion portion that is configured to press the release driving force receiving portion to rotate the driving lever latch to the release position. a rotating shaft portion; a hook portion that extends from the rotating shaft portion toward the switch driving lever mechanism (26, 27) to restrain the switch driving lever mechanism (26, 27); and a release driving force receiving portion that extends from the rotating shaft portion to an opposite side of the hook portion to be brought into contact with a manual reset lever, wherein the manual reset lever comprises a pressing protrusion portion that is configured to press the release driving force receiving portion to rotate the driving lever latch to the release position.