Image forming assembly and image forming apparatus

An image forming assembly including a first assembly that includes an image holding member which rotates by receiving a rotational driving force and holds a toner image after an electrostatic latent image is formed thereon by exposure and the toner image is formed by development and a supporting member which supports the image holding member, a second assembly that includes a developing member which is disposed adjacent to the image holding member, rotates by receiving a rotational driving force, and transports a toner to a developing region facing the image holding member and a toner holding member which holds the toner and supplies the toner to the developing member, and a connection member that includes a pressing member in which a first through hole and a second through hole are formed and that is fixed to the supporting member.