A balloon catheter (100) comprising: a proximal body (120)； a distal body (140)； an intermediate body (130) that is located between the proximal body (120) and the distal body (140)； a light (122, 132, 142, 162) that penetrates through the proximal body (120), the intermediate body (130) and the distal body (140) and introduces and expels a dilation liquid from a balloon (150)； an inner tube body (160) that penetrates through the light (142) of the distal body (140) having a light (162) that accommodates a guide opening (164) arranged at the boundary between the intermediate body (130) and the distal body (140) and through which the light extends (122, 132, 142, 162)； and a reinforcing member (170) that is arranged in the light (122, 132, 142, 162) to prevent twisting, characterized in that the reinforcing member (170) has a tapered proximal portion (172) that is fixed to the proximal body (120) and disposed within the light (122, 132, 142, 162) located in the intermediate body (130), a tapered distal portion (178) that is disposed within the light (122, 132, 142, 162) located in the distal body (140), and a transient straight portion (176) that is located between the proximal portion (172) and the distal portion (178), and in which the transient portion (176) is aligned with the opening (164) for guidance.Un catéter (100) de balón que comprende: un cuerpo proximal (120)； un cuerpo distal (140)； un cuerpo intermedio (130) que está situado entre el cuerpo proximal (120) y el cuerpo distal (140)； una luz (122, 132, 142, 162) que penetra a través del cuerpo proximal (120), del cuerpo intermedio (130) y del cuerpo distal (140) e introduce y expulsa un líquido de dilatación de un balón (150)； un cuerpo interno (160) de tubo que penetra a través de la luz (142) del cuerpo distal (140) que tiene una luz (162) que da cabida a una abertura (164) para guía dispuesta en el límite entre el cuerpo intermedio (130) y el cuerpo distal (140) y a través de la cual se extiende la luz
