An image forming apparatus prevents the problem of reduced utilization efficiency of a waste fluid tank caused by the storage of waste fluids with high and low viscosities in the same open-type waste fluid tank. The image forming apparatus includes a first waste fluid tank for storing waste ink fluid ejected from a recording head, and a second waste fluid tank for storing waste ink fluid ejected into a cap of the recording head. The waste ink fluid ejected into the cap is guided to the second waste fluid tank via a tube. The second waste fluid tank is an airtight structure having an inlet at one end to which the tube is detachably connected via a needle or a valve. At the other end of the second waste fluid tank, there is disposed an opening communicating the inside and the outside of the tank.