Abstract: An air mattress is disclosed, which comprises an upper raw material member which has a coating layer at an upper surface of the same; a lower raw material which is spaced and installed at a lower side of the upper raw material member and has a coating layer at a lower surface of the same; a plurality of fiber threads which vertically connect the upper and lower raw material members and react with respect to an external pressure; a coated side raw material which is fixedly engaged to seal a surrounding portion between the upper and lower raw material members; and an air injection valve engaged at one side of the side raw material. A force distribution function is excellently performed when an external impact is applied to the air mattress according to the present invention, so that a distortion phenomenon of the product is prevented.