Brush holder stay of rotary electric machine

A brush holder stay of a rotary electric machine, the brush holder stay comprising:

• a ring-shaped stay part that has formed therein on its inner-radial side a through hole having fitted thereinto a sintered oil-impregnated bearing for supporting a rotating shaft;
• and
• a holder portion that is integrally formed on the stay part and that accommodates therein a brush slide in contact with a commutator fitted over the rotating shaft in such a manner that the brush freely moves out from and into the holder portion, wherein the stay part is provided with a concave groove portion located on at least one side of the holder portion in the circumferential direction and the concave groove portion is formed with an end wall on the inner radial side and having a depth in the axial direction of the rotating shaft so as to serve as an oil pool for an oil path which goes from the through hole toward the outer-radial side of the holder portion via the stay part.