To provide a tool that protects a vaginal cavity while promoting sexual pleasure to mitigate coital pain and simultaneously enable contraception and prevention of sexually transmitted diseases (STD).SOLUTION: A tool for protecting a vaginal cavity is composed of: a body part in a cylindrical pouch shape made of a material having sufficient toughness； and an approximately flat seat part made of a material having sufficient toughness. On the seat part is provided an aperture through which a penis is to be inserted. The body part is connected to the seat part along the aperture. The body part can block friction and pressing impact caused by reciprocating motion of the penis.SELECTED DRAWING: Figure 1【課題】 性的快感を増進すると共に膣道を保護し、性交痛を改善すると同時に避妊および性感染症（ＳＴＤ）の予防もできる器具を提供すること。【解決手段】 十分な強靭度を持つ材料からなる円筒パウチ状の本体部と十分な強靭度を持つ材料からなる略平板状の座部から構成され、座部には陰茎を通す開口部が設けられ、本体部は前記開口部に沿って座部と連結される、本体部は陰茎の抽送運動による摩擦と圧迫衝撃を遮断出来ることを特徴とする。【選択図】図１
