Image forming apparatus

An image forming apparatus comprising:

• an apparatus body including a fan and a duct portion through which airflow generated by the fan flows, the duct portion including (i) a first opening from which the airflow blows and (ii) a projecting portion configured to guide the airflow to the first opening;
• and
• a process cartridge that is detachable from the apparatus body and is attached to the apparatus body in a position in which the process cartridge receives the airflow blown from the first opening, the process cartridge including:
• a photosensitive drum,
• a developing roller configured to supply developer to the photosensitive drum,
• a casing including a first side surface in which a second opening is formed, and
• a guided portion,
• wherein the second opening communicates with a space inside the process cartridge, to which a surface of the photosensitive drum and a surface of the developing roller are exposed,
• wherein, when viewed in a rotational axis direction of the photosensitive drum, the first opening and the second opening overlap,
• wherein, in the rotational axis direction, the projecting portion projects in a direction away from an attachment space in which the process cartridge is attached,
• wherein the apparatus body further includes a side plate extending in a direction intersecting with the rotational axis direction and a guide member configured to guide the guided portion in a case in which the process cartridge is attached to and detached from the apparatus body,
• wherein the process cartridge is arranged on a first side in the rotational axis direction with respect to the side plate,
• wherein the fan is arranged on a second side in the rotational axis direction with respect to the side plate,
• wherein the side plate includes a hole into which the projecting portion is inserted, and
• wherein the projecting portion projects from the first side to the second side through the hole.