Abstract: A health care air bed having a mattress. The mattress includes several support air cells which are assembled at intervals on the mattress and are mutually connected with each other. Furthermore, a spongy mat is laid on the mattress so as to provide a level surface for the bed. A mouth is utilized for extracting and inflating air. The mouth is assembled at a side of the mattress. The support air cells are divided into five strips which support the neck, back, waist, hip and leg of human body respectively. This invention is applicable to a single air chamber or a double air chamber. The mattress for queen size and king size beds have two separate air chambers. In accordance with physiological characteristics of the human body, this invention designs support points at an interval so that the neck, back, waist, hip and leg of the human body can be effectively supported that is helpful to a person's health and extends human life.