To provide a subcutaneous implantable port of a new structure in which a gap between an elastic body and a housing can be suppressed small.SOLUTION: A subcutaneous implantable port 10 is provided as follows: an annular surface protruding into an inner side and a recess positioned in an inner circumferential side of the annular surface are formed in an inner face 106 of an elastic body 16 before being assembled to a housing 12； alternatively, the housing has a compression holding part 60 for compressing the circumference part of the annular surface in the thickness direction when being assembled in an opposed portion of the annular surface of the elastic body, and an abutment surface 70 formed in an inner circumferential side of the compression holding part, having he height lower than the compression holding part, and coming in abutment with the inner face of the elastic body when the elastic body is assembled to the housing； and the outer circumferential surface of the recess of the elastic body is directed to the inner side by the compression in the compression holding part, and at least a portion thereof is overlapped with the abutment surface.SELECTED DRAWING: Figure 3【課題】弾性体とハウジングとの隙間を小さく抑えることのできる、新規な構造の皮下埋込型ポートを提供する。【解決手段】皮下埋込型ポート１０であって、ハウジング１２への組付前の弾性体１６の内面１０６には、内面側に突出する環状面と、環状面の内周側に位置する凹部とが形成されている一方、ハウジングは、弾性体の環状面の対向部分において、組み付け時に環状面の外周部分を厚さ方向に圧縮するための圧縮保持部６０と、圧縮保持部の内周側に形成され、圧縮保持部より高さが低く、弾性体をハウジングに組み付けた際に弾性体の内面と当接する当接面７０とを有しており、圧縮保持部での圧縮によって弾性体の凹部の外周面が内面側に向きを変え、その少なくとも一部が当接面と重なり合っている。【選択図】図３
