In a stator for an alternator includes electric conductors which include a plurality of winding sub-portions in each of which one long strand of wire is bent back outside the slots at end surfaces of the stator core and wound into a wave winding so as to alternately occupy an inner layer and an outer layer in a slot depth direction within the slots a predetermined number of slots apart, and the turned portions of the strands of wire bent back outside the slots at both the end surfaces of the stator core are disposed in a circumferential direction so as to constitute a joint-side coil end and a turn-side coil end and the plurality of windings sub-portions are connected to each other on the joint-side coil end at a first end of the stator core, the average amount of application per unit area of any one of the varnish, with which the joint-side coil end is impregnated and the varnish, with which the counter-joint-side coil end is impregnated, is larger than the average amount of application per unit area of the other of the varnishes. With this construction, there can be obtained a stator for an automotive alternator in which the insulation of a joint-side coil end having no insulation film can be improved and the amount of varnish for impregnation is not unncessarily increased.