Provided is an electrophotographic apparatus including: an electrophotographic photosensitive member; and a corona charger configured to positively charge the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a monolayer type photosensitive layer. The photosensitive layer contains a charge generating substance, a hole transporting substance, an electron transporting substance, and a binder resin. The binder resin contains a polyester resin having a specific structural unit.