Image forming apparatus

An image forming apparatus, comprising:

• an image forming unit configured to form an image on a sheet being conveyed on a conveyance path;
• a double feed sensor configured to execute double feed detection processing of detecting a state in which a plurality of sheets are conveyed in a duplicate manner;
• a storage configured to store, according to a type of a sheet, in advance setting of whether to enable or disable the double feed detection processing;
• a setting unit configured to set sheet setting information including characteristic information on a characteristic of a sheet to be used for image formation and double feed detection setting information on whether to execute the double feed detection processing,
• the double feed detection setting information including settings for:
• an automatic mode, in which whether to enable the double feed detection processing is determined based on the setting stored in the storage;
• an on mode, in which the double feed detection processing is enabled irrespective of the setting stored in the storage;
• and
• an off mode, in which the double feed detection processing is disabled irrespective of the setting stored in the storage;
• and
• a controller configured to determine whether to enable the double feed detection processing at a time of image formation based on a type of a sheet to be used for the image formation and on the double feed detection setting information corresponding to the type of the sheet.