FLOCCULATOR

PROBLEM TO BE SOLVED: To provide a flocculator capable of easily performing replacement work of a submerged bearing, a replacement frequency of the submerged bearing being small by preventing an occurrence of uneven abrasion that occurs in the submerged bearing supporting a stirring shaft.SOLUTION: In a flocculator 1 provided with a stirring shaft 10, the body 11 of which is molded with a lamination type resin member, and a stirring plate 30 connected to the stirring shaft 10 through a fixed arm 20, the stirring shaft 10 being supported by a submerged bearing, the submerged bearing is a rolling bearing which includes an exterior part 50 having an inner circumferential surface 51 to be divided vertically, an internal rotation part 60 having an internal rotation flange part 61 connected to a shaft flange part 12 molded with a lamination type resin material at an end part of the stirring shaft 10, and three or more rolling bodies 70 being in contact with the inner circumferential surface 51, provided on the outer circumferential side of the internal rotation part 60, and molded with material whose hardness is lower than that of the inner circumferential surface 51.