Patent ID: 8269382

Claim:
A cooling structure of a stator, including a case that accommodates a rotating electrical machine, and cooling a coil end portion protruding from a stator core included in the stator of the rotating electrical machine toward one side in a stator axial direction by supplying a cooling medium from the other side in the stator axial direction toward a cooling medium introducing gap that is formed between an inner surface of the case and an outer peripheral edge of one axial end face of the stator core, wherein the cooling medium introducing gap is formed above a portion of the coil end portion to which the cooling medium is to be supplied, a storage space forming member is provided along an outer peripheral surface of the coil end portion, the storage space forming member forming a cooling medium storage space with the inner surface of the case therebetween so that the cooling medium introducing gap opens in the cooling medium storage space on the other side thereof in the stator axial direction, and the storage space forming member has a contact portion having a first contact portion that contacts the inner surface of the case to close the cooling medium storage space on the one side in the stator axial direction, and a cooling medium discharge opening for supplying the cooling medium introduced into the cooling medium storage space to the coil end portion.