The present invention relates to an apparatus for relaxing a respiratory tract and a bronchial tube, wherein the apparatus is manufactured in a form of a necklace hung on the neck, and a color light in the visible light wavelength band is irradiated at the region of the Tiantu point, which is known to be useful for the prevention and treatment of human respiratory diseases, that is, a dent region at which ends of left and right clavicle meet each other below the front of the neck, for a predetermined time to induce the secretion of a material for relaxing muscles (e.g., nitrogen monoxide or the like) in muscular cells of the respiratory tract and the bronchial tube, thereby relaxing the respiratory tract and the bronchial tube. The present invention is manufactured in a form of a necklace hung on the neck relaxes the respiratory tract or the bronchial tube through visible light harmless to the human body is cheap and is conveniently used anywhere and at anytime, and thus can prevent the contraction of the respiratory tract or the bronchial tube, which is important in alleviating symptoms, such as cough, bronchial inflammation, asthma, and chronic obstructive pulmonary disease and is very useful for sports players who are prevented from taking drugs due to drug tests or users (e.g., children) who are uneasy about medication side effects.
