PROBLEM TO BE SOLVED: To use a disposable cylindrical container with a filter for accommodating beads used for blood purification or the like without using an O-ring, and to manage tightening etc., without damaging a filter held inside the container. (EN) Provided is a tubular container made of a thermoplastic resin, which has a sufficient hermeticity and does not require much labor for assembling. A header has a header protrusion having a substantially rectangular shape in a central axis (P) cross section that protrudes toward a tubular container body, and the header protrusion has an inner peripheral surface entirely in the circumferential direction and an outer peripheral surface. A tubular container characterized in that the header and the tubular container main body are welded by the melting of the thermoplastic resin in an airtight or liquid-tight state while holding the ring with the filter in the entire circumferential direction. [Selection diagram] Figure 2【課題】血液浄化等に用いるビーズを収容するためのフィルター付き使い捨て筒状容器においてＯリングを用いず、かつ、締め付け等の管理が不要であり、容器内部に保持されるフィルターを破損せず、十分な密閉性を有し、組み立てに手間がかからない熱可塑性樹脂製筒状容器の提供。【解決手段】ヘッダーは、筒状容器本体に向かって突出する中心軸（Ｐ）断面において略矩形状のヘッダー突出部を有し、該ヘッダー突出部の内周面の周方向全体及び外周面の周方向全体において、ヘッダーと筒状容器本体とが、フィルター付きリングを保持しつつ、気密又は液密状態で該熱可塑性樹脂の溶融により溶着されていることを特徴とする筒状容器。【選択図】図２
