An introducer sheath in which a sheath tube can be easily restored to a state before being kinked even when the sheath tube of the introducer sheath is bent to cause kinking during medical practice. An introducer sheath including: a sheath tube which has a central cavity structure continuing from a proximal portion to a distal portion； and a sheath hub which is connected to the proximal portion of the sheath tube. A return angle of a kinked portion when the sheath tube is bent by 180° is 0° to 15°.
