The present invention relates to a body balance device, which includes a main body made of a cushioning material. The main body includes a first metatarsal bone section, a fourth metatarsal bone section, and a foot heel section. The main body forms a primary adjustment structure located between the first metatarsal bone section and the fourth metatarsal bone section and a secondary adjustment structure located between the fourth metatarsal bone section and the foot heel section and corresponding to outside of the main body. Both adjustment structures are formed with a structure of through hole or cavity in which a soft material is selectively embedded to allow the human body to reach a balanced condition when standing or walking so as to improve the discomfort of bones and muscles caused by long standing or walking.
