A digestive tract device that can reduce an indwelling-induced burden on the living body includes: a tubular portion that includes a through hole; a holding portion that is provided on a proximal end side of the tubular portion, and holds the tubular portion in the living body; and support portions and which are provided in the holding portion, and are in contact with a plurality of sites of the digestive organ of the living body, and support the holding portion in such a way that the holding portion can move in at least one direction of a circumferential direction and a longitudinal direction of the tubular portion.