A reproduction method for a developing device for an image forming apparatus, the developing device including: a frame of the developing device; a developer carrying member that carries a developer; a bearing member that rotatably supports the developer carrying member; a first fixing member having electric conductivity and that is provided so as to pass through a through hole provided in the frame; and a resin member having electric conductivity and that is fixed to the bearing member and engaged with the first fixing member, the reproduction method comprising the steps of: releasing the engagement between the first fixing member and the resin member and separating the resin member from the frame; characterized in that the reproduction method includes the steps of replacing parts to be used in the developing device or replenishing the developing device with the developer; connecting the resin member to the frame; and inserting a second fixing member having electric conductivity into the through hole to engage with the resin member and fix the resin member to the frame, thereby fixing the bearing member to the frame, wherein the reproduction method further includes the step of attaching a deformable conductive member to at least one of the second fixing member and the resin member so that the deformable conductive member is interposed between the second fixing member and the resin member. a frame of the developing device; a developer carrying member that carries a developer; a bearing member that rotatably supports the developer carrying member; a first fixing member having electric conductivity and that is provided so as to pass through a through hole provided in the frame; and a resin member having electric conductivity and that is fixed to the bearing member and engaged with the first fixing member, the reproduction method comprising the steps of: releasing the engagement between the first fixing member and the resin member and separating the resin member from the frame; characterized in that the reproduction method includes the steps of replacing parts to be used in the developing device or replenishing the developing device with the developer; connecting the resin member to the frame; and inserting a second fixing member having electric conductivity into the through hole to engage with the resin member and fix the resin member to the frame, thereby fixing the bearing member to the frame, wherein the reproduction method further includes the step of attaching a deformable conductive member to at least one of the second fixing member and the resin member so that the deformable conductive member is interposed between the second fixing member and the resin member. releasing the engagement between the first fixing member and the resin member and separating the resin member from the frame; characterized in that the reproduction method includes the steps of replacing parts to be used in the developing device or replenishing the developing device with the developer; connecting the resin member to the frame; and inserting a second fixing member having electric conductivity into the through hole to engage with the resin member and fix the resin member to the frame, thereby fixing the bearing member to the frame, wherein the reproduction method further includes the step of attaching a deformable conductive member to at least one of the second fixing member and the resin member so that the deformable conductive member is interposed between the second fixing member and the resin member.