An image forming apparatus includes: sheet feed trays on which sheets are placed; a transferrer that transfers an image formed by an image forming part onto a sheet at a transfer position; conveyance roller pairs provided along conveyance paths from the sheet feed trays to the transfer position and that conveys a fed sheet; a conveyance position detector that detects a conveyance position of a conveyed sheet in a width direction; a sheet position adjuster that performs adjustment of the conveyance position of the sheet in the width direction by using an amount of displacement; and a hardware processor that determines, on the basis of a sheet feed tray that is to be used among the sheet feed trays and a sheet length of a sheet that is to be fed from the sheet feed tray, whether or not the adjustment of the conveyance position is to be performed.