PROBLEM TO BE SOLVED: To provide a vaginal insertion tool and a puncture method in which manipulation to embed an indwelling object for supporting a biological tissue in the living body can be safely performed.SOLUTION: A vaginal insertion tool 5 comprises: a long vaginal insertion part 51 which is inserted into a vagina 1400 a suction part 54 which is arranged in the vaginal insertion part 51 and an inflow reduction part 522 which is arranged in the vaginal insertion part 51 so that air inflow into the vagina 1400 through a vaginal opening 1410 is reduced while the vaginal insertion part 51 is inserted into the vagina 1400. The inflow reduction part 522 is positioned covering the vaginal opening 1410, while the vaginal insertion part 51 is inserted into the vagina 1400.COPYRIGHT: (C)2015,JPO&INPIT【課題】生体組織支持用留置物を容易に生体内に埋設する手技を安全に行うことのできる膣挿入具および穿刺方法を提供すること。【解決手段】膣挿入具5は、膣1400内に挿入される長尺な膣挿入部51と、膣挿入部51に設けられた吸引部54と、膣挿入部51に設けられ、膣挿入部51が膣1400内に挿入された状態にて、膣口1410を介した膣1400内への空気の流入を低減する流入低減部522と、を有している。また、流入低減部522は、膣挿入部51が膣1400内に挿入された状態にて、膣口1410を覆うように位置する。【選択図】図21