To provide an ozone filter the pressure drop of which is made small, which exhibits excellent performance in decomposing ozone and with which a nasty smell can be decreased even when used in a copying machine, or the like, for a long time.

This ozone filter to be installed in an exhaust route for removing ozone generated in an image forming apparatus is composed of an activated carbon-deposited filter which is arranged on the upstream side and has ≥5 mg/cc toluene-adsorptive ability and a metal oxide-deposited filter which is arranged on the downstream side and has ≥2.5 mg/cc acetic acid-adsorptive ability.