IMAGE FORMING DEVICE

The present invention relates to an image forming apparatus (1) for forming a toner image on a recording material (P). The image forming apparatus (1) comprises a process unit (20) including a photosensitive drum (21), a developing roller (31) configured to supply a toner to the photosensitive drum (21), and a toner accommodating portion (32) configured to accommodate the toner to borne on the developing roller (31) and provided with an attaching portion (57); an apparatus body (100) to which the process unit (20) is detachably attached, the apparatus body (100) being provided with an opening (82a) from which the attaching portion (57) of the process unit (20) is exposed to an outside of the apparatus body (100) and through which the process unit (20) is not capable of being attached to and detached from the apparatus body (100); an opening/closing member (83) configured to rotate, with respect to the apparatus body (100), about a rotational axis (83a) extending in a longitudinal direction of the photosensitive drum (21) between an open position where the opening/closing member (83) opens the opening (82a) and a closed position where the opening/closing member (83) closes the opening (82a); a toner container (40) detachably attached to the attaching portion (57), of the process unit (20), which is exposed from the opening (82a) of the apparatus body (100), the toner container (40) accommodating the toner; a display panel (300) in which a button is provided; and a controller (90) configured to execute a replenishment operation of replenishing the toner accommodating portion (32) with the tone from the toner container (40), wherein an execution of the replenishment operation is started based on an operation of the button.