An air massage apparatus according to the invention comprises the components of a leg covering part which is a band part which can wind a leg; and an air bag which is arranged on the leg covering part. The leg covering part is provided with components of: an adjusting part which comprises a structure that can adjust the wearing dimension of the leg covering part in a wearing state of winding on the leg; and a combining and separating part which is used for combining or separating a first part and a second part, wherein the first part comprises a first end in the length direction of the leg covering part, and the second part comprises a second end in the length direction of the leg covering part. The combining and separating part is configured for combining or separating the first part andthe second part in a state which is related with the wearing dimension of the leg covering part that is adjusted by the adjusting part.