DEVICE FOR DIGESTIVE TRACT

PROBLEM TO BE SOLVED: To provide a device for a digestive tract that can improve operability and can impose little burden on a living body.SOLUTION: The device 100 for a digestive tract includes: a cylinder part 110 having a through-hole 111; a first expansion part 130 which is arranged on the penetration-direction proximal end side of the cylinder part 110 and is expanded to enlarge the outer diameter when a fluid from an outside flows in the first expansion part; a second expansion part 140 which arranged on the penetration-direction proximal end side of the cylinder part 110 and closer to a distal end side compared with the first extension part 130 and is expanded to enlarge the outer diameter; and an adjustment part 162 which adjusts the flow of the fluid from an outside in such a way that the second expansion part 140 is expanded before the expansion of the first expansion part 130.