An image forming apparatus comprising: an image forming portion configured to form an unfixed toner image on a recording material; a fixing portion detachably mountable to said image forming apparatus, said fixing portion including a rotatable member for being contacted by such a surface of the recording material as carries the unfixed toner image formed by said image forming portion to fix the unfixed toner image on the recording material; a jam detecting portion (153, 155, 301) configured to detect an occurrence of jamming in said fixing portion; a storing portion provided on said fixing portion and configured to store information; a writing portion configured to write cleaning information indicative of whether or not a cleaning process for cleaning said rotatable member after clearance of the jamming is already executed into said storing portion, said writing portion writing information, as the cleaning information, indicative of non-execution of the cleaning process whenever the occurrence of jamming in said fixing portion is detected by said jam detecting portion, and said writing portion writing information, as the cleaning information, indicative of the cleaning process is already executed at least in response to executing the cleaning process; a notifying portion configured to notify an operator of a state of capability of image forming operation on the recording material of said image forming apparatus; and an executing portion configured to execute the cleaning process before said notifying portion executes the notification, when the cleaning information obtained from said storing portion of said fixing portion mounted in said image forming apparatus indicates non-execution of the cleaning process. an image forming portion configured to form an unfixed toner image on a recording material; a fixing portion detachably mountable to said image forming apparatus, said fixing portion including a rotatable member for being contacted by such a surface of the recording material as carries the unfixed toner image formed by said image forming portion to fix the unfixed toner image on the recording material; a jam detecting portion (153, 155, 301) configured to detect an occurrence of jamming in said fixing portion; a storing portion provided on said fixing portion and configured to store information; a writing portion configured to write cleaning information indicative of whether or not a cleaning process for cleaning said rotatable member after clearance of the jamming is already executed into said storing portion, said writing portion writing information, as the cleaning information, indicative of non-execution of the cleaning process whenever the occurrence of jamming in said fixing portion is detected by said jam detecting portion, and said writing portion writing information, as the cleaning information, indicative of the cleaning process is already executed at least in response to executing the cleaning process; a notifying portion configured to notify an operator of a state of capability of image forming operation on the recording material of said image forming apparatus; and an executing portion configured to execute the cleaning process before said notifying portion executes the notification, when the cleaning information obtained from said storing portion of said fixing portion mounted in said image forming apparatus indicates non-execution of the cleaning process.