Image forming apparatus

An image forming apparatus comprising:

• an image carrier unit including an image carrier;
• a developing device which includes a developer carrier for supplying toner onto an outer circumferential surface of the image carrier and which is placed in adjacency to the image carrier unit;
• a unit support frame for supporting the image carrier unit and the developing device such that the image carrier unit and the developing device are fittable thereto and removable therefrom individually;
• and
• a developing holder which is provided on the unit support frame and which holds the developing device such that the developing device is swingable in a direction that allows the developer carrier to get nearer to or further separate from the image carrier, wherein
• the developing holder includes:
• a driving gear for transmitting motive power to the developing device;
• and
• a pair of swinging shaft parts which have a rotational axis extending parallel to an axial direction of the developer carrier and which are supported rotatable relative to the unit support frame, and an axial distance between the pair of swinging shaft parts is longer than a distance from a rotational center of the driving gear to a rotational center of the swinging shaft parts.