A medical tube (10) includes a flexible tube-shaped main body (12), a hub (14) connected to a proximal portion of the tube-shaped main body (12), and a strain relief (16) supported at a distal portion of the hub (14), the strain relief (16) surrounding a predetermined range of a proximal side of the tube-shaped main body (12). The tube-shaped main body (12) includes a flexible portion (30) whose flexibility for bending is increased by forming at least one groove (32) extending in a circumferential direction in an outer circumferential portion over a predetermined range from a distal side from a most distal portion (17) of the strain relief (16) to a proximal side from the most distal portion (17).
