A sheet processing apparatus comprises that a plurality of sheet processing potions that perform a sheet process on a sheet; and a plurality of conveying paths which transport the sheet to connect to the plurality of sheet processing potions, respectively, wherein while one of the plurality of sheet processing potions executes the sheet process on a preceding sheet or a preceding sheet bundle, a subsequent sheet is conveyed to the conveying path connecting to the other one of the plurality of sheet processing potions and held on standby on the conveying path connecting to the other sheet processing potion.