A stator of a rotating electric machine, the stator including: a cylindrical stator core formed by stacking, in an axial direction, electromagnetic steel plates arranged to surround an outer circumference of a rotor; stator coils contained in a plurality of slots that are spaced apart along an inner circumference surface of the stator core; a plurality of wedges that extend in the axial direction and are inserted into opening portions of the slots in the axial direction and arranged adjacent to each other in the axial direction so that the stator coils latch into the slots to remain therein; and a plurality of inner spacers arranged, every time a plurality of layers of the electromagnetic steel plates of the stator core are stacked, so as to be sandwiched between the electromagnetic steel plates, extend radially, and are arranged such as to be spaced apart in a circumferential direction such that ventilation ducts through which cooling gas flows are formed, wherein shoulder portions of at least two wedges are partially cut to form notches on both sides in the circumferential direction such that the circumferential-direction width of the shoulder portions of at least two wedges that are adjacent to each other in the axial direction, among a plurality of the wedges, at locations corresponding to the ventilation ducts is substantially equal to the width of the slots, characterized in that: chamfered portions are formed in the notches at a radially inner side of the stator core, the chamfered portions being surfaces inclined at a chamfer angle (α), wherein the chamfer angle (α) is the angle between a wedge inner circumference surface and a corner portion of the wedge inner circumference surface, in a chamfer depth (h) provided on an inner circumference corner portion of the wedge which is less than a thickness (t) of the wedges, at an opening area for a gas gap, which is a gap between the stator core and the rotor, of the ventilation ducts. a cylindrical stator core formed by stacking, in an axial direction, electromagnetic steel plates arranged to surround an outer circumference of a rotor; stator coils contained in a plurality of slots that are spaced apart along an inner circumference surface of the stator core; a plurality of wedges that extend in the axial direction and are inserted into opening portions of the slots in the axial direction and arranged adjacent to each other in the axial direction so that the stator coils latch into the slots to remain therein; and a plurality of inner spacers arranged, every time a plurality of layers of the electromagnetic steel plates of the stator core are stacked, so as to be sandwiched between the electromagnetic steel plates, extend radially, and are arranged such as to be spaced apart in a circumferential direction such that ventilation ducts through which cooling gas flows are formed, wherein shoulder portions of at least two wedges are partially cut to form notches on both sides in the circumferential direction such that the circumferential-direction width of the shoulder portions of at least two wedges that are adjacent to each other in the axial direction, among a plurality of the wedges, at locations corresponding to the ventilation ducts is substantially equal to the width of the slots, characterized in that: chamfered portions are formed in the notches at a radially inner side of the stator core, the chamfered portions being surfaces inclined at a chamfer angle (α), wherein the chamfer angle (α) is the angle between a wedge inner circumference surface and a corner portion of the wedge inner circumference surface, in a chamfer depth (h) provided on an inner circumference corner portion of the wedge which is less than a thickness (t) of the wedges, at an opening area for a gas gap, which is a gap between the stator core and the rotor, of the ventilation ducts.