A gasket for use in a syringe so formed as to liquid-tightly and slidably contact an inner surface of an outer cylinder of the syringe, the gasket including a gasket body made of an elastic body and a coating layer formed on a portion thereof which contacts at least the syringe, wherein the coating layer includes a composition containing a silicone resin which includes a condensate of a reactive silicone resin having a terminal silanol group and which has a siloxane bond derived from the silanol group, and does not contain solid fine particles.
