The multiple-gap electric rotating machine includes a rotor cantilever-supported at a first axial end thereof by a rotor arm coupled to a rotating shaft. The rotor includes a laminated core of core sheets made of soft magnetic material and an end-surface core disposed on a surface of the laminated core on a second axial end of the rotor. The laminated core includes segments joined in a ring and each formed with a salient pole structure at each of radially inner and outer peripheries thereof. The end-surface core includes soft magnetic sections made of steel and non-magnetic sections made of stainless steel, which are joined together in a ring. The laminated core is held between the rotor arm and the end-surface core, and fixed to the rotor arm by rivets penetrating through the rotor arm, laminated core and the end -surface core.