Disclosed are a sliding opening and closing device and a portable terminal
having the same. According to the first embodiment of the present
invention, a slide plate is linked to a main plate to be slidable in one
direction. Also, the main plate supports an elastic part so as to
generate an elasticity power in one direction. A power transformation
member receives the elasticity power of the elastic member, and transmits
the elasticity power to the slide plate in the direction of the opening
or the closing according to the position of the slide plate.