PROBLEM TO BE SOLVED: To provide an indwelling material for a nasal cavity that improves ventilation and can suitably prevent its positional deviation and falling.SOLUTION: An indwelling material for a nasal cavity 100 comprises a first extension part 110 and a second extension part 120 that extend in a bifurcating manner, apply holding force on an in vivo structure MT in a nasal cavity, and have air permeability.COPYRIGHT: (C)2016,JPO&INPIT【課題】換気性を向上させ、さらに位置ずれや脱落が発生するのを好適に防止し得る鼻腔用の留置物を提供する。【解決手段】鼻腔用の留置物100は、二股状に分かれて延在し、鼻腔内の生体内構造物MTに対して挟持力を作用させる通気性を備える第1の延在部110および第2の延在部120を有する。【選択図】図2