provided is a structure for a slip ring and a brush of a wrsm capable of reducing an axial length of a motor by increasing a contact area between the slip ring and the brush and improving reliability for smoothly implementing performance of the motor by stably supporting a shaft of the motor , the structure including : an inner slip ring combined with a rotation shaft of a motor ; a brush disposed at a circumference of the inner slip ring and having a plurality of wrinkles contacting an outer circumferential surface of the inner slip ring formed therein ; an outer slip ring disposed at a circumference of the brush and making in contact with the plurality of wrinkles of the brush ; and a holder that supports the outer slip ring .