Patent ID: 8923733

Claim:
A developer supplying device comprising: an inflow path into which a developer falls from a container unit; a guide path having an inlet to which a lower end of the inflow path is connected, the guide path extending diagonally downward from the inlet, the guide path guiding the developer, which has been introduced into the guide path through the inlet from the inflow path, to a developing unit; and a transport unit disposed in the guide path, the transport unit including a helical screw blade and a holder that holds the helical screw blade, the transport unit transporting the developer, which has been introduced into the guide path, to the developing unit by rotating, wherein, in at least a part of a region in the guide path facing the inlet, a pitch of the helical screw blade in a horizontal direction is greater than or equal to a width of the inlet, and the holder is located at a position displaced from the rotation axis of the transport unit.