A slide hinge device mounted between two terminal bodies opening and closing by a slide type. The slide hinge device includes a rail hinge unit and a slide hinge unit. The rail hinge unit includes a guide bar disposed parallel with a side of the rail plate, and the slide hinge unit includes a slide guide, in which a penetration hole corresponding to the guide bar is formed in the center thereof, for sliding along the guide bar and a guide frame bound with the slide guide as one body. Also, a lubricating bush is previously connected between the guide bar and a moving bush, and the rail hinge unit and the slide guide may be simultaneously molded by die casting or injection molding. The slide guide may be manufactured by using self-lubricating material. The hinge device using the guide bar may be molded via one molding process. Since, basically, the slide hinge device is formed by a single molding process, an error between components may be minimized.