A suction transport device capable of reducing manufacturing cost due to reduction of the number of suction mechanisms by which one of photopolymer plates accommodated in a magazine is taken out is attained. Also separability when the printing plate is taken out is improved, thus improving reliability of the suction transport device. Since, among suckers and suction fans, those located at positions corresponding to the widthwise direction ends of the printing plates are movable in the widthwise direction, and separating plates are movable in the same direction. When one of the printing plates of a different size is to be taken out, the leading end corner portions of the printing plate can always be curved at a fixed curvature, and separability is improved. Further, there is no need to increase the number of suckers thus decreasing cost.