To allow anyone to easily arrange flowers spherically and three-dimensionally in a flower vase though it is difficult for anyone but a specialist to stably and diagonally arrange flowers in the flower vase at an angle because the inner wall of the flower vase is slippery etc.

One or a plurality of approximately annular or spiral projecting structures or recess structures are formed on the inner surface except for an opening and the bottom of the flower vase. By putting the lower ends of stems of the arranged flowers on the projecting structures or recess structures, or by hooking the lower ends of the stems under the projecting structures or recess structures, the flowers are diagonally inserted into the flower vase at an angle, and are spherically and three-dimensionally arranged in the flower vase. Alternatively, attachable flower vase members in an approximately annular or spiral shape are set on the inner surface except for the opening and the bottom of the flower vase.