The present invention relates to a life-saving air vest, which is filled with gas inside the air vest so that the wearer can float in the air. More specifically, the air vest and the balloon are integrally formed, and the vest-shaped balloon is formed inside the air vest. On the front of the air vest, a gas supply unit for supplying gas to the balloon formed on the back of the air vest through a vest-shaped balloon and a gas discharge control unit for gas control are formed. The gas transported through the balloon is formed to fill the balloon in the balloon storage unit. When a person suffers from fire, explosion, earthquake, or sea at low or high rise building, he wears the air vest of the present invention and safely lands on the ground. A life-saving air vest that can descend or float in the air.
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