In an air massage device (1), a boot (20) is formed by cloth sewed in a three-dimensional mode. An air bag is installed in the boot (20) to press a shank portion and a foot portion. A shank portion cover (30) forms part of the boot (20) and covers the shank portion. A shank portion cover fastening tool (31,32) is arranged to the shank portion cover (30) to fasten the shank portion cover (30) in a mode of closely fitting the shank portion cover (30) to the shank portion. A foot portion cover (40) forms one part of the boot (20) and covers the foot portion. A foot portion cover fastening tool (41) is arranged to the foot portion cover (40) to fasten the foot portion cover (40) in a mode of closely fitting the foot portion cover (40) to the foot portion. The shank portion cover fastening tool (31,32) can adjust the fastening degree of the shank portion cover (30) the foot portion cover fastening tool (41) can adjust the fastening degree of the foot portion cover (40). The air massage device (1) can properly massage lower limbs.
