PROBLEM TO BE SOLVED: To provide an apparatus for automatically arranging a plurality of items in a canvas, which automatically arranges a plurality of items in a limited space in a form of collage while maintaining a size relation among the items.SOLUTION: The apparatus includes: an arrangement position selecting unit which determines a position of a cell which is divided to arrange a k-th item, among respective cells having k-1 items arranged therein in a canvas where the k-1 items are already arranged; a cell dividing unit which divides a cell region of the position determined by the arrangement position selecting unit; an item arranging unit which arranges the k-th item at the position of the divided cell; and a first canvas size adjusting unit which increases an entire size of the canvas as needed in the case where a space for arranging the k-th item is insufficient when the item arranging unit arranges the k-th item at the position of the divided cell.