PROBLEM TO BE SOLVED: To provide a deep vein thrombosis preventing tool enabling a user himself to perform easily movement for preventing deep vein thrombosis in a medical facility or own house or on a seat of an aircraft or the like, without depending on a doctor or a nurse.SOLUTION: A deep vein thrombosis preventing tool 1A includes a sole fixation part 2 fixed to a sole, an installation part 3 having a belt-like body 3a fixed to a thigh L so as to be wound around the thigh L, and an elastic part 4 comprising an elastic material for imparting energizing force against rotation, when an ankle joint is rotated, by connecting the sole fixation part 2 to the installation part 3.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】医師又は看護師に頼らず、医療施設、自宅、航空機の座席等において使用者自らが容易に深部静脈血栓症予防のための運動を行うことができる深部静脈血栓予防具を提供する。【解決手段】深部静脈血栓予防具1Aは、足底に固定される足底固定部2と、下腿Lに巻かれるように該下腿Lに固定される帯状体3aを有する装着部3と、前記足底固定部2と前記装着部3とを接続して、足関節を回動させる際に該回動に抗して付勢力を与える弾性材料からなる弾性部4と、を備える。【選択図】図1