PROBLEM TO BE SOLVED: To provide an enteral feeding bag having a novel structure capable of opening an opening portion more stably and holding it in an opened state. SOLUTION: This is an enteral nutrition bag in which a liquid containing area 24 having an opening 12 at the upper portion is formed between overlapping surfaces of sheets 18 on both front and back sides. Is attached with an elastic member 46 extending in the width direction of the sheet 18 on at least one of the sheets 18 on both front and back sides, and presses both widthwise edges of the sheet 18 in the opening portion 12 in a direction of approaching each other. A deformation assisting mechanism is provided to assist the deformation of the opening portion 12 of the elastic member 46 in the opening direction when the opening operation force is applied. [Selection diagram] Figure 1【課題】開口部分をより安定して開口し、更に開口状態に保持することができる、新規な構造の経腸栄養バッグを提供すること。【解決手段】開口部分１２を上部に有する液状体の収容領域２４が表裏両側のシート１８，１８の重ね合わせ面間に形成された経腸栄養バッグであって、収容領域２４の開口部分１２には、表裏両側のシート１８，１８の少なくとも一方においてシート１８の幅方向に延びる弾性部材４６が取り付けられていると共に、開口部分１２におけるシート１８の幅方向両縁部を互いに接近させる方向へ押圧する開口操作力の作用に際して、弾性部材４６における開口部分１２の開き方向への変形を補助する変形補助機構が設けられている。【選択図】図１
