PROBLEM TO BE SOLVED: To provide indwelling medical equipment capable of easily acquiring information on its specifications, etc. after being indwelled in a body.SOLUTION: There is provided indwelling medical equipment having a body indwelled in a human body. The body is configured so as to include a marker part 40 indicating at least one of a character, a mark, and a graphic on the indwelling medical equipment, which is composed of a non-metal member whose X-ray transmissivity is lower than that of the body. When the body such as this is radiographed, the nonferrous metal member is shown with the body in the background. By the difference in the X-ray transmissivity between the nonferrous metal member and the body, contrast is generated in the two, and the shape drawn by the nonferrous metal member can be visually recognized in the radiography.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】体内に留置された後、簡易にその仕様等の情報を得ることができる留置型医療機器を提供する。【解決手段】体内に留置される本体を有する留置型医療機器を構成する。この際、本体は、本体よりもX線の透過率が低い非金属部材で構成されて留置型医療機器に関する文字、マーク及び図形の少なくとも一つを表す標識部40を備えるように構成される。このような本体をX線撮影すると、本体を背景に非鉄金属部材が写る。このとき、非鉄金属部材と本体とのX線透過率の相違によって両者にコントラストが付き、非鉄金属部材の描く形状がX線写真にて視認できる。【選択図】図4