A magnetic trip device according to the present disclosure comprises an actuator coil part (21) having a plunger (21a); an output plate (22) configured to rotate in a first direction by the pressing of the plunger (21a); a micro switch (28) configured to output an electrical signal indicating a state of the circuit breaker; a switch driving lever mechanism (26, 27) configured to rotate to a first position for pressing the operation lever portion and a second position for releasing the operation lever portion; a driving lever bias spring (32) for elastically pressing the switch driving lever mechanism; an automatic reset mechanism (23) for pressing the plunger to the retracted position; a driving lever latch (29) configured to rotate to a restraining position for preventing the switch driving lever mechanism from rotating to the first position, and a release position; and an avoiding portion formed on the output plate to avoid contacting with the switch driving lever mechanism.