To provide a self-contained portable infusion bag capable of reducing contact danger during movement during drip infusion, improving restraint of a range of action, improvement of degree of freedom, size reduction, and weight reduction.SOLUTION: A spherical inner infusion bag 2 composed of a thin and transparent stretchable material 3 having a high stretchability and a high contractibility for accommodating an infusion 4 is placed in an opening 5 located at the inner bottom of an outer infusion bag 1 made of a transparent material And is characterized by a double structure infusion bag shape fitted with an infusion bag.BACKGROUND OF THE INVENTION【課題】点滴中の移動時における接触危険の軽減、行動範囲の拘束改善、自由度の向上、サイズの小型化、軽量化を図ることが可能となる自給式ポータブル輸液バッグを提供する。【解決手段】透明素材からなる外側輸液バッグ1の内側底部に位置する開口部5に、輸液4を収容する伸張性・収縮性の高い薄く透明な伸縮素材3からなる球形状の内側輸液バッグ2を装着した二重構造の輸液バッグ形状を特徴とする。【選択図】図1