A framework for efficient information management

This invention provides an electrophotographic apparatus of the type wherein an upper unit open-/close-able with respect to a lower unit is provided with a sensitizing drum and a de-electrifying light source for eliminating residual potential on the sensitizing drum, which is characterized in that the de-electrifying light source is a membrane light emitting element, and this membrane light emitting element is movable so as to make open and closed the lower part of the sensitizing drum.