INDUSTRIAL APPLICABILITY According to the present invention, as a planar transplantation chamber having a structure in which immunological isolation membranes are opposed to each other, which is capable of stably encapsulating biological constituents, and has an immunological isolation membrane at the boundary between the inside and the outside, and faces each other. A 10 mm × 30 mm rectangular test piece of the immunoisolation membrane having junctions where the immunoisolation membranes are joined to each other and including a point where the internal space is 10 mm or more from any position of the junctions. When a 10 mm portion from one side of the short side is sandwiched from above and below by a flat plate and made horizontal, the horizontal plane including the center plane in the thickness direction of the sandwiched immunoisolation membrane part and the remaining length protruding from the flat plate The implant chamber having flexibility to give a distance of 1 mm or more and 13 mm or less as a distance from a part of the 20 mm portion that is farthest from the horizontal plane, and a biological component in the implant chamber. Implantable devices that are included are provided.本発明により、生物学的構成物を安定に内包することができる、免疫隔離膜同士が対向した構造の平面状移植用チャンバーとして、内部と外部との境界に免疫隔離膜を有し、対向する免疫隔離膜が互いに接合している接合部を有し、内部空間が上記接合部の何れの位置からも距離が１０ｍｍ以上となる点を含み、上記免疫隔離膜の１０ｍｍ×３０ｍｍの長方形の試験片の片方の短辺の側面から１０ｍｍの部分を上下から平板で挟み込んで水平にしたときの挟み込まれた上記免疫隔離膜の部分の厚み方向中心面を含む水平面と上記平板から突出している残りの長さ２０ｍｍ部分の上記水平面から最も遠い部位との距離として１ｍｍ以上１３ｍｍ以下を与えるたわみ性を有する移植用チャンバー、ならびに上記移植用チャンバーに生物学的構成物が内包されている移植用デバイスが提供される。
