Rotary electric machine

A rotary electric machine comprising:

• a stator core having an annular shape, in which a plurality of slots formed in an axis direction are arranged in a circumferential direction;
• and
• a stator winding which is composed of a plurality of coil conductors wound around the slots of the stator core;
• wherein
• the stator winding is composed of coil slots, which are inserted to the slots, and coil ends extended toward the outside in the axis direction of the stator core;
• and
• the coil conductors of the coil slots are configured in such a way that a cross-sectional areas at central portions in the axis direction are wider cross-sectional areas at both end portions, and the cross-sectional areas of the coil conductors are reduced along the coil slots from the central portions to the both end portions.