An image forming apparatus that can provide notification, so that maintenance personnel of a manufacturer or the like can be made aware of a usage condition in a case where an unsuitable toner cartridge is intermittently used. The image forming apparatus is equipped with a primary storage section storing specific information concerning a replaceable part, such as a toner cartridge that can be attached or removed from a main body, and a secondary storage section storing information concerning usage of the replaceable part. The specific information is read from the primary storage section in a condition where the replaceable part is attached, and a judgment is made by a judgment section concerning whether the replaceable part is suitable. If the replaceable part cannot be judged as suitable, information concerning the use of the replaceable part is stored in the secondary storage section and notification is provided by a notification section.