A curved sliding-type portable communication apparatus and a sliding device thereof are provided. The sliding-type portable communication apparatus includes a main body which includes a plurality of first keys on its top surface and a slider which includes a display device on its top surface, is given a closing force within a predetermined distance from the longitudinal direction of the main body while facing the main body, moves in a curved fashion with an opening force beyond the predetermined distance, provides easy initial movement through the curved movement, and opens and closes the top surface of the main body. Thus, it is easy to open and close the sliding-type portable communication apparatus using the thumb while gripping the sliding-type portable communication apparatus by the hand. |