PURPOSE: To feed a sufficient quantity of abrasive solution to the polished surface of a workpiece stably over a long period of time.

CONSTITUTION: This abrasive solution feed mechanism is rotatably supported on a housing 1, and the main constituent elements of this abrasive solution feed mechanism are a rotary shaft 3 provided with a polishing disc 2 integrally at the lower end, a blade cylinder 4 fixed to the outer periphery of the rotary shaft 3 by insertion, a fixed cylinder 6 provided around the outer periphery of the rotary shaft 3 by insertion with a space part 5 and fixed at its upper end to the housing 1, an abrasive solution feed pipe 7 connected to the fixed cylinder 6, and a feed hole 2a formed in the polishing disc 2.