An image processing apparatus includes a first conveying path, a curved conveying path, a second conveying path, an upper cover, a first image reading section, a third conveying roller, a second conveying roller, a second image reading section, a first conveying roller, a fourth conveying roller and a control unit. The control unit controls to stop conveying the sheet when a back edge of the sheet passes the first conveying roller in the case where a length of the sheet is less than a first distance between the first conveying roller and the third conveying roller, and controls to stop conveying the sheet after conveying the sheet until the back edge passes the third conveying roller in the case where the length of the sheet is greater than the first distance and is less than a second distance between the third conveying roller and the fourth conveying roller.