Abstract: A closure device for connecting two members which for example have at least in regions the form of plates, includes a closure pin which can be secured, if necessary, loss-proof on the first member and a receiving element which can be disposed on the back side of the second member. The closure pin has a head section for bracing on the front side of the first member and a shaft section which can be guided through an opening of a guidance sleeve disposed in an opening of the first member. The shaft section has threads cooperating with counterthreads of a connecting section of the receiving element. The guidance sleeve on the end associated with the heat section of the closure pin includes a radially expanded head section and at the end facing away from the head section of the closure pin a radially expandible collar-like securing section which is bent round-about outwardly.