Rotating electric machine rotor

In order to improve the cooling performance of the rotor of a rotating electric machine, in view of the relationship between the secondary and main flows of a cooling gas occurring, in a rotating state of the rotor, inside a cooling gas ventilation hole provided in a rotor winding formed by laminating a conductor and an inter-layer insulating layer, an inner wall surface of the rotor winding ventilation hole on the negative pressure side is provided with a shape change in a protrusion linearly appearing in the direction of said lamination so as to suppress the secondary flow of the cooling gas. 为了提高旋转电机的转子的冷却性能，在转子的旋转状态下，着眼于在冷却气体的通风孔的内部产生的冷却气体的二次流动与冷却气体的主流的关系，在由导体和层间绝缘层层叠而成的转子绕组所设有的转子绕组通风孔的负压侧的内壁面设置沿上述层叠的方向呈线状出现的隆起的形状变化，以抑制冷却气体的二次流动。