PROBLEM TO BE SOLVED: To provide a port member capable of suppressing displacement of a plug body even when a needle body is inserted and removed, and a bag provided with the port member. A port member (10) provided in a bag has a hollow cylindrical body (12) and an elastic plug body (11) held in the cylindrical body (12). A needle body for passing the contents can be pierced in the thickness direction, and the plug body 11 has a length larger than the width in the circumferential direction on the outer peripheral surface 16 in contact with the inner surface of the cylindrical body 12. The cylindrical body 12 is integrally molded over at least the area where the inner surface of the cylindrical body 12 faces the plug body 11, and the inner surface of the cylindrical body 12 has the outer peripheral surface 16 of the plug body 11 and It is a molded product that is in close contact with the convex portion 13. [Selection diagram] Figure 1【課題】針体の抜き差しを行っても栓体の位置ずれを抑制することが可能なポート部材及びこれを備えたバッグを提供する。【解決手段】バッグに設けられるポート部材１０であって、中空の筒体１２と、筒体１２の中に保持された弾性体からなる栓体１１とを有し、栓体１１は、バッグの内容物を通過させるための針体を厚さ方向に刺通させることが可能であり、栓体１１は、筒体１２の内面に接する外周面１６に、周方向に幅よりも大きい長さを有する凸状部１３を有し、筒体１２は、少なくとも筒体１２の内面が栓体１１に面する範囲にわたり一体に成形され、かつ、筒体１２の内面が栓体１１の外周面１６及び凸状部１３と密着した成形品からなる。【選択図】図１
