An image forming apparatus includes: a conveyance path that conveys a sheet; registration rollers that are arranged across the conveyance path and each comprise a nip part; a sheet locking member that locks a front end of a sheet conveyed in the conveyance path, where the sheet locking member swings between a first attitude and a second attitude, in the first attitude the sheet locking member locks the sheet on an upstream side of the nip part, and in the second attitude the sheet locking member is retracted to a downstream side of the nip part and allows the sheet to pass through the nip part; an energizer that energizes the sheet locking member to maintain the first attitude; and a hardware processor that detects deterioration of the energizer.