A medical tube includes a first portion, a second portion, a third portion, and a fourth portion in this order from a proximal side to a distal side thereof. The first portion has a tubular resin layer, the second portion has a tubular inner layer and outer layer, the third portion as an inner layer and outer layer, and the fourth portion has a tubular resin layer. When flexural rigidity of the first portion, the second portion, the third portion, and the fourth portion is G1, G2, G3, and G4, respectively, the flexural rigidity of each portion being configured to have a relationship with each other portion based upon the following expression (1):G1>；G2>；G3>；G4 (1)
