A sheet conveying apparatus includes a first conveying path through which a sheet is conveyed; a reversal conveyance driving unit which drives to reversely convey the sheet conveyed through the first conveying path; a second conveying path which branches off with the first conveying path and through which the sheet reversely conveyed by the reversal conveyance driving unit is conveyed; and a movable unit which causes a branch position between the first conveying path and the second conveying path to move on a downstream side in a conveying direction of the sheet which is conveyed through the first conveying path, after a trailing end of the sheet which is conveyed through the first conveying path passes the movable unit.