An electromagnetic switch device for a starter, comprising: a pair of main fixed contacts forming a main electric circuit for a motor ; a pair of starting circuit contacts forming a starting circuit for the motor ; a main movable contact which is movably located between the pair of main fixed contacts and the pair of starting circuit contacts , which opens and closes the main electric circuit by opening and closing the pair of main fixed contacts , and which opens and closes the starting circuit by opening and closing the pair of starting circuit contacts ; a starting resistor which forms the starting circuit and through which a starting current for the motor may flow; an attraction coil generating a magnetic field for moving a main movable core toward the pair of main fixed contacts ; a main fixed core forming a magnetic circuit generating for magnetic force by the magnetic field of the attraction coil ; a terminal block to which the pair of main fixed contacts are fixed and which includes a contact chamber that is a space in which the main movable contact is movable; an A connector which forms the starting circuit , which is connected to the starting resistor , and which has an end at which one of the pair of starting circuit contacts is located; a B connector which forms the starting circuit , which is connected to one of the pair of main fixed contacts , and which has an end at which one of the pair of starting circuit contacts is located; characterized in that an insulating member electrically insulating the A connector and the B connector from the main fixed core ; and an elastic member sealing the contact chamber , wherein the A connector and the B connector are held between the terminal block and the main fixed core with the insulating member and the elastic member interposed therebetween. a pair of main fixed contacts forming a main electric circuit for a motor ; a pair of starting circuit contacts forming a starting circuit for the motor ; a main movable contact which is movably located between the pair of main fixed contacts and the pair of starting circuit contacts , which opens and closes the main electric circuit by opening and closing the pair of main fixed contacts , and which opens and closes the starting circuit by opening and closing the pair of starting circuit contacts ; a starting resistor which forms the starting circuit and through which a starting current for the motor may flow; an attraction coil generating a magnetic field for moving a main movable core toward the pair of main fixed contacts ; a main fixed core forming a magnetic circuit generating for magnetic force by the magnetic field of the attraction coil ; a terminal block to which the pair of main fixed contacts are fixed and which includes a contact chamber that is a space in which the main movable contact is movable; an A connector which forms the starting circuit , which is connected to the starting resistor , and which has an end at which one of the pair of starting circuit contacts is located; a B connector which forms the starting circuit , which is connected to one of the pair of main fixed contacts , and which has an end at which one of the pair of starting circuit contacts is located; characterized in that an insulating member electrically insulating the A connector and the B connector from the main fixed core ; and an elastic member sealing the contact chamber , wherein the A connector and the B connector are held between the terminal block and the main fixed core with the insulating member and the elastic member interposed therebetween. <EOS>