PROBLEM TO BE SOLVED: To provide a device for digestive tract that reduces a burden on a living body in association with length adjustment of a cylindrical part placed in the living body and also realizes simplification of placing work after introduction into the living body.SOLUTION: A device for digestive tract includes: a cylindrical part 110 that includes a body part 113 including a longitudinally-extending through-hole 111 and including a tip opening 112 connected to the through-hole and includes a folded part 114 where the body part is folded longitudinally a holding part 180 that holds the folded part in a folded state while the tip opening is opened and a placing part 120 that is provided on a base end side of the cylindrical part and places the cylindrical part in a living body.COPYRIGHT: (C)2015,JPO&INPIT【課題】生体内に留置した筒部の長さ調整に伴う生体への負担を軽減するとともに、生体内に導入した後の留置作業の簡略化を図り得る消化管用デバイスを提供する。【解決手段】消化管用デバイスは、長手方向に伸びる貫通孔111および貫通孔に連なる 先端開口112を備える本体部113と、本体部が長手方向に折り返された折り返し部114とを備える筒部110と、先端開口を開口させた状態で折り返し部を折り返した状態に保持する保持部180と、筒部の基端側に設けられ、筒部を生体内に留置する留置部120と、を有する。【選択図】図1