PROBLEM TO BE SOLVED: To provide a medical container where a thermoplastic resin-made thin film whose outer edge part and inner edge part are reliably thermally sealed is arranged at an opening end of a cylindrical member and which prevents the occurrence of liquid leakage due to a failure in sealing the thin film and a failure in mounting an elastic seal member that is caused by a failure in breaking the outer edge of the thin film.SOLUTION: A medical container 1 includes a soft container body 2 and a discharge port 3. The discharge port includes: a cylindrical member 31 having an opening end 38 a thin film 34 for sealing the opening end and an elastic seal member 33 attached to the opening end with the thin film arranged therein. The opening end and thin film of the cylindrical member 31 have a ring shape seal part 37 formed by thermal sealing. The ring shape seal part includes: a ring shape inclination fusion part 37a to be gently inclined in an internal direction toward an inner edge from an outer edge part and a ring shape bending fusion part 37b to be formed in an inner edge part, smoothly continuing to the ring shape inclination fusion part 37a, and to be inclined while more largely bending in an internal direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】筒状部材の開口端部に、外縁部および内縁部が確実に熱シールされた熱可塑性樹脂製の薄膜を備え、薄膜のシール不良に起因する液漏れ、薄膜の外縁の破断不良に起因する弾性封止部材の装着不良を生じることない医療用容器を提供する。【解決手段】医療用容器1は、軟質容器本体2と排出ポート3とを備える。排出ポートは、開口端部38を有する筒状部材31と、開口端部を封止する薄膜34と、薄膜が設けられた開口端部に取り付けられた弾性封止部材33とを有する。筒状部材31の開口端部と薄膜は、熱シールにより形成された環状シール部37を有し、環状シール部は、外縁部より内縁に向かって内部方向になだらかに傾斜する環状傾斜融着部37aと、内縁部に形成され、環状傾斜融着部37aとなめらかに連続しかつ内部方向により強く湾曲しながら傾斜する環状湾曲融着部37bとを備える。【選択図】図6