Disclosed is a formed article comprising a layer obtained by implanting ions of a hydrocarbon compound into a polyorganosiloxane compound-containing layer. Also disclosed are: a method of producing the formed article, the method comprising implanting ions of a hydrocarbon compound into a surface of a polyorganosiloxane compound-containing layer of a formed body that includes the polyorganosiloxane compound-containing layer in its surface; an electronic device member that includes the formed article; and an electronic device that includes the electronic device member. The present invention provides; a formed article which exhibits an excellent gas barrier capability, transparency, bendability, antistatic performance, and surface flatness; a method of producing the formed article, an electronic device member, and an electronic device.