Abstract: Provided is a mobile communication terminal including an upper plate secured to a rear surface of an upper frame and having a first coupling shaft to which one side of a driving link is secured such that the upper frame is vertically guided, a middle frame including a first guide provided at one side of a front surface thereof to guide the first coupling shaft of the upper plate, and first guide means provided at both sides of a rear surface thereof, and a main plate including a main frame secured to a rear surface thereof, sliding guide parts slidably guided along the first guide means of the middle frame at both sides thereof, a second coupling shaft provided at one side of a front surface thereof and to which the other side of the driving link is secured, and a support means for the middle frame installed at the other side of the front surface.