An image forming apparatus includes: a main body housing; a drum cartridge; a toner cartridge, which is attachable to and detachable from the drum cartridge and includes a memory having an electrical contact surface; a connector, which is configured to be in contact with the electrical contact surface, and a controller is configured to execute: connection determination processing of determining whether electrical connection with the memory is made, electrical conduction determination processing of determining whether the applying circuit is electrically conducted with the charger, and notification processing of notifying information indicating whether the drum cartridge is mounted to the main body housing and information indicating whether the toner cartridge is mounted to the main body housing, in accordance with results of the connection determination processing and the electrical conduction determination processing.