a liquid crystal display device includes a first substrate and a second substrate which sandwiches a liquid crystal between itself and the first substrate , wherein the first substrate has thin film transistors and a wiring connection portion in which are formed terminals connected to the thin film transistors , a wiring substrate connected to the terminals is disposed in the wiring connection portion , the second substrate is a plastic substrate , and has an adhesive layer and an inorganic insulating layer formed on top of the adhesive layer , and the adhesive layer covers the wiring connection portion and one portion of the wiring substrate .