PURPOSE: To realize a high capacity rotor by increasing the diameter restricted by rejective casting texture or segregation caused by a precipitation hardening Ni based alloy.

CONSTITUTION: A winding fixing shaft for holding a laminate conductor 22 is split into a winding fixing shaft 20 and a wedge stopper 24 wherein the winding fixing shaft 20 is made of a precipitation hardening Ni based alloy and integrated with the wedge stopper 24. Consequently, the diameter of the winding fixing shaft 20 can be decreased. Since the diameter of winding fixing shaft can be made larger by an amount corresponding to the part not formed of the precipitation hardening Ni based alloy than the diameter restricted by the rejective basting texture or segregation, capacity of generator can be increased.