Respiratory tract widening tool and respiratory tract widening unit provided therewith

A respiratory tract widening tool for attaching to an outer periphery of a human neck, comprising:

• a main body that comes into contact with a posterior side of the neck when the tool is worn and receives an upward external force in a supine posture;
• a pair of jaw retainers that extend forward from the main body spaced apart by a distance equivalent to a diameter of the neck and come into contact with both sides of a lower jaw when the tool is worn;
• and
• a protruding section that is provided in the main body and applies stress in a direction of pushing up the lower jaw in a supine posture to the main body, wherein:
• the main body and the pair of jaw retainers are formed of a restorable member,
• the pair of jaw retainers have jaw contact portions respectively, which are formed into a shape complementary to a bent shape of the lower jaw and come into contact with the lower jaw to support the lower jaw from below,
• the main body and jaw retainers deform, when the posture is changed from the supine posture, in conformity with the posture, and when the posture is changed to the supine posture, the external force received by the main body is made to act on jaw contact portions to push up the lower jaw and retain the lower jaw at a height at which the respiratory tract can be managed, and
• the main body comprises a receiving face that is directed downward in a supine posture to press a tool underlay surface facing the neck and also receives a counterforce from the underlay surface.