PROBLEM TO BE SOLVED: To provide a mosquito breeding prevention tool for preventing the outbreak of mosquitoes in a flower stand of a grave in a temple or a cemetery. SOLUTION: A space is provided inside in the shape of an inverted truncated cone, and the top end of the inside is thinned to form a flexible shape 2. The thickness of the stem of a fresh flower that grows in all directions from the center Make a combined cut 4 to improve the adhesion with the stem, and when there are no fresh flowers, the cut 4 returns to reduce the gap, prevent mosquitoes from entering and exiting, make the outside thicker to ensure high elasticity, and increase the contact points with the flower stand. A mosquito breeding prevention device in the shape of an inverted truncated cone that does not easily come off even if the fresh flowers shake greatly. [Selection diagram] Fig. 1【課題】お寺や霊園のお墓の花立における蚊の発生を防止する蚊繁殖防止用具を提供する。【解決手段】逆円錐台の形状で内側に空間を設けて、内側の天端を肉薄にして可撓性を有する様に形成２して、、中心より八方に生ける生花の茎の太さに合わせた切り込み４を入れ、茎との密着を高め、生花が無い時には切り込み４が戻り隙間を減らし、蚊の出入りを防ぎ、外側は厚みを持たせ高弾性を確保し、花立との接点が増えるようにし生花が大きく揺れても外れ難くい逆円錐台の形状の蚊繁殖防止用具。【選択図】図１
