PROBLEM TO BE SOLVED: To provide a method for stably stacking flowerpots or vessels for arranging flesh flowers or artificial flowers therein. SOLUTION: This method comprises joining flowerpots or vessels for arranging flesh flowers with one another, on each of the upper edges and bottom edges of which at least one hole is formed, using shafts having flanges so made as to get in the holes at both ends but not to get therein at the portion therebetween.