PROBLEM TO BE SOLVED: To enable use in a state floating in water of a bathtub or the like by a simple configuration, and to provide a relaxation effect to a user.SOLUTION: In a water surface floating volatilizing agent container 1 for use in a state floating in water and having a rubber-like elastic container part 10 capable of storing a volatilizing agent 40 having volatility, the rubber-like elastic container part 10 has in its wall pores having a diameter allowing slow release of the volatilizing agent 40 in a gas state to the outside and preventing leakage of the volatilizing agent 40 in a liquid state to the outside. When put into water in a state storing the volatilizing agent 40, at least a part of the rubber-like elastic container part 10 is exposed to outside air, and the volatilizing agent 40 in a gas state is slow released through pores in the part of the rubber-like elastic container part 10 exposed to the air.COPYRIGHT: (C)2016,JPO&INPIT【課題】簡易な構成にて、浴槽等の水に浮かべて使用可能であり、使用者にリラクゼーション効果をもたらせるようにする。【解決手段】揮発性を有する揮散剤を収容可能なゴム状弾性容器部10を有し、水に浮かべて使用するための水面浮遊揮散剤収容容器1において、ゴム状弾性容器部10は、その壁に、気体状態の揮散剤40を外部に徐放可能であって、液体状態の揮散剤40を外部に漏れ出させない径の細孔を有し、揮散剤40を収容した状態で水に入れられると、ゴム状弾性容器部10の少なくとも一部が外部の空気中に露出し、ゴム状弾性容器部10の空気中に露出した部分の細孔から、気体状態の揮散剤40を外部に徐放するように構成する。【選択図】図2