A toner agitation member includes a connection portion provided to be rotated around a rotation shaft within a toner storage chamber and extending radially outwards from the rotation shaft, and an agitation plate, provided at a distal end of the connection portion, for scraping a toner deposited on a bottom of the toner storage portion and supplying it to a toner supply opening provided in the toner storage chamber as the connection portion is rotated. The connection portion and the agitation plate are integrally formed of the same material.