As for the gasket for the syringe of this invention, inside the barrel of the syringe way the liquid densely sliding possibly it contacts, being the gasket which was formed, as for the said gasket, the gasket itself which consists of the elastic body and, as it has with the carpet course which is provided in the part which at least contacts with the aforementioned syringe, the said carpet course consists of the condensate of the reactivity silicone which possesses the terminal shiranoru basis and consists of the composition which contains the silicone resin which possesses the polysiloxane connection which is derived from the aforementioned shiranoru basis, the solid particulate it has become something which is not included.本発明のシリンジ用ガスケットは、シリンジの外筒内を液密に摺動可能に接触するよう形成されたガスケットであって、該ガスケットは、弾性体からなるガスケット本体と、少なくとも前記シリンジと接触する部分に設けられた被覆層とを備え、該被覆層は、末端シラノール基を有する反応性シリコーンの縮合物からなり前記シラノール基に由来するシロキサン結合を有するシリコーン系樹脂を含有する組成物からなるとともに固体微粒子を含まないものとなっている。
