In a rotating electric machine iron core, a first end of a back yoke portion is connected to a second end of the back yoke portion of an adjacent divided iron core rotatably around an axis portion. The divided iron cores are configured by alternately stacking a first core piece and a second core piece. The axis portion is constituted by a fitting protrusion formed on the first core piece. When a divided iron core connected body is linearly expanded, the divided iron cores can be displaced with respect to adjacent divided iron cores between a reduction position in which the distance between magnetic pole tooth portions is reduced and an enlargement position in which the distance between the magnetic pole tooth portions is enlarged.
