To provide a rotating electric machine for vehicle which can control accumulation of abrasion powder of a brush in a brush holder by causing a flow of air in the brush holder.

An AC generator for vehicle 100 is provided with a rotor 4 which includes a rotating shaft 44 having a pair of slip rings 47 and 48 connected electrically with a field winding 41 and a cooling fan 46 fixed to the axial end face on the slip ring side, a brush device 6 having a pair of brushes 61 and 62 which slide on the slip rings 47 and 48, a brush holder 200 in which sections 211 and 212 for containing the pair of brushes 61 and 62 are formed, and a cover member 250 which covers the slip rings 47 and 48 along with the brush holder 200, a portion 71 to be detected which is arranged at one end of the rotating shaft 44, and a detection section 72 which detects the rotational position of the portion 71 to be detected. A cooling fan 73 is provided between the portion 71 to be detected and the slip rings 47 and 48.