A medical elongated body 1 or a balloon catheter 2 that include a catheter main body 100, a tubular body 110, and a distal member 140 at a distal end of the tubular body. The distal member is more flexible than the tubular body. The distal end of the tubular body is joined to the distal member at a joint portion 150. The tubular body includes an outer layer 130 and an inner layer 120 disposed inside of the outer layer in the radial direction of the tubular body. The material of the inner layer possesses better fusing properties with respect to the distal member than the fusing properties of the outer layer material with respect to the distal member material. The inner layer is interposed between the distal member and the outer layer by extending between the distal member and the outer layer at the joint portion.
