To provide an auxiliary orthosis capable of eliminating movement of an injection needle caused by an unexpected movement of a limb or the like at the time of intravenous injection and thereby avoiding pain at the injection site.SOLUTION: The drip assistant device has a three-part structure of an impact avoiding portion, a limb fixing portion and a tension avoiding portion. In the impact avoiding part, direct contact or impact to the injection site 709 is avoided by the protective cover 701, and the impact absorbing material 706 is attached to the fixing part with the limb fixing part so as not to indirectly affect the injection site To do. In the limb fixing part, a limb body fixed bed 710 having a shape and a length matching the limb and a plurality of parts of the limb are fixed by the fixing belt 707 to prevent the joint in the vicinity of the drip site from being bent. In the tension avoiding part, a tube is wrapped around the pulley shaped protrusion 712, and the front and the rear thereof are fixed by the fixing belt 713 so that the tension of the tube from the bottle side is not transmitted to the injection needle.(FIG.【課題】点滴静脈注射時における不意の肢体動作等で生じる注射針の動きをなくし、それにより注射部位の痛みを回避できる補助装具を提供する。【解決手段】点滴補助装具は、その機能を衝撃回避部、肢体固定部および張力回避部の三部構成とする。衝撃回避部では保護カバー701により注射部位709への直接的な接触や衝撃を回避し、肢体固定部との固定箇所に衝撃吸収材706を付して間接的にも注射部位に影響を与えないようにする。肢体固定部では、肢体に整合する形状と長さをもつ肢体固定床710と肢体の複数箇所を固定ベルト707で固定し、点滴部位付近の関節の屈曲を防止する。張力回避部では滑車形状突起物712にチューブを巻きつけ、その前後を固定ベルト713で固定し、ボトル側からのチューブの張力が注射針に伝わらないようにする。【選択図】図7