The utility model relates to a trunk auxiliary device, which is suitable for encircling and binding a trunk of a human body, and the trunk auxiliary device comprises a plate and a strap.The plate has a stress surface and a compression surface opposite to the stress surface, and a first through hole and a second through hole are formed.The strap passes through the first and second perforations and is defined as a compression section between the first and second perforations and two joint sections extending from opposite ends of the compression section respectively.The two joint segments are used to connect with each other around the torso in an opposite direction, so that the compression segment presses the force bearing surface in a manner toward the torso of the human body, so that the compression surface presses a part of the torso.一種軀幹輔具，適於環繞綁束在一人體的一軀幹，該軀幹輔具包含一板件及一束帶。該板件具有一受力曲面及一相反於該受力曲面的壓迫曲面，且形成有一第一穿設孔及一第二穿設孔。該束帶穿設在該第一穿設孔及該第二穿設孔而被界定出一位於該第一穿設孔及該第二穿設孔之間的壓迫段及兩分別自該壓迫段相反兩端延伸的接合段。該兩接合段用以相向環繞該軀幹地相互接合，以使得該壓迫段以朝向該人體的軀幹的方式緊壓該受力曲面，以致該壓迫曲面迫緊該軀幹的一局部。
