The purpose of the present invention is to provide a medical device in which a sub-tube into which an operating wire is inserted can be fixed to a tubular shape, without separation. The catheter (100) of the present invention is provided with a long tubular body (10), the operating wire (60), and an operating unit (90). The tubular body (10) includes: a long inner layer (24) that demarcates a main tubular cavity (20) a wire-reinforced layer (30) formed around the inner layer (24) by coiled reinforcing wire (32) the resin sub-tube (40) that is positioned on the outside of the wire-reinforced layer (30) so as to extend along the length direction of the main tubular cavity (20), and demarcates a sub-tubular cavity (42) having a smaller diameter than the main tubular cavity (20) a resin outer layer (50) that envelopes the wire-reinforced layer (30) and the sub-tube (40) and a supporting wire (70). The operating wire (60) is passed through the inside of the sub-tubular cavity (42) such that movement is possible, and the tip is connected to a distal part of the tubular body (10). The support wire (70) is enveloped by the outer layer (50) and is wound around both the sub-tube (40) and the wire-reinforced layer (30). The support wire (70) is fitted to the outer-radial side peripheral surface of the sub-tube.La présente invention vise à fournir un dispositif médical dans lequel un sous-tube, dans lequel un fil de commande est inséré, peut être fixé à une forme tubulaire, sans séparation. La présente invention concerne par conséquent un cathéter qui est doté dun long corps tubulaire (10), du fil de commande (60), et dune unité de commande (90). Le corps tubulaire (10) comprend : une longue couche intérieure (24) qui délimite une cavité tubulaire principale (20) une couche renforcée par un fil (30) formée autour de la couche intérieure (24) par un fil de renforcement enroulé (32) le sous-tube en résine (40) qui est positionné sur lextérieur de la couche renforcée par un fil
