To solve the following problem: in a cannula widely used conventionally, since it is often displaced while worn, a patient cannot inhale gases appropriately, skin trouble, such as an ulcer, occurs to a part where it is worn, and an external appearance looks worse when worn to impose physical and mental burdens on the patient.

A nasal ala type nasal cannula body which is in almost T-letter shaped and is hollow is supported by a nasal tip part and the nasal ala, a tube extending below along the nasal septum and a prong at the tip keep an appropriate space which does not come in contact with the skin, and a gas feeding tube can be worn around an auricular region from an infraorbital region passing above the cheek bone part.