This creation is the piecing devices that one kind can maintain negative pressure, and it includes a sucker ontology and a hollow column jacket connector, which is connected with the sucker ontology, and has an at least circular protrusion structure on the outside of the cylinder of the hollow column jacket connector； By the reduced pressure delivery tube of Reduced pressure treatment system through the engagement with the hollow column jacket connector when use, it is attached with the sucker ontology, again by the wound surface of sucker ontology covering what individual, to provide a subnormal ambient at wound surface, achieve the effect that negative pressure treatment.本創作是一種可維持負壓之接頭裝置，其包含一吸盤本體及一中空管柱接頭，該中空管柱接頭與該吸盤本體相連接，且該中空管柱接頭之柱體外側具有至少一環狀突起結構；使用時將減壓治療系統的減壓輸送管透過與該中空管柱接頭之接合，與該吸盤本體進行連接，再將該吸盤本體覆蓋於個體之傷口表面處，為傷口表面處提供一負壓環境，達到負壓治療的效果。
