PROBLEM TO BE SOLVED: To provide a body worn device that is wound around a calf to promote venous return and to effectively prevent or improve symptoms such as fatigue, swelling, sensitivity to cold in legs.SOLUTION: A body worn device to be worn around a leg includes: a body brought into contact with the circumference of a leg and an attachment part for holding the body part in an abutment state to the circumference of a leg. The elongation percentage of the body part is set to be 10-30%, and the pressure difference between the contraction phase and the relaxation phase when worn around a leg, is set to be 12-15 mmHg.COPYRIGHT: (C)2014,JPO&INPIT【課題】脹脛に巻装される身体着用具であって、静脈環流を促進させ、足の疲れ、むくみ、冷え症等の症状を効果的に予防又は改善できる身体着用具を提供する。【解決手段】下腿部に装着される身体着用具であって、下腿部の周囲に当接される本体部と、本体部を下腿部の周囲に当接した状態で保持させる取付部とを備え、本体部の伸長率が10~30%であり、下腿部に装着した際の収縮・弛緩期圧差が12~15mmHgとなるように設定されていることを特徴とする。【選択図】図4