An image forming apparatus includes: an image holder; a developing device that develops a latent image formed on the image holder with developing material; a developing material cartridge that has a supply developing material container to contain developing material; and a developing material conveyance unit, having a connection portion connected to the developing device, that conveys the developing material from the supply developing material container to the developing device. The developing material cartridge is provided in a direction approximately orthogonal to the developing device. At least a part of the connection portion is provided within a heightwise directional width of the developing material cartridge.