A portable electronic apparatus includes a main body having a top surface on which a keypad is exposed and a bottom surface disposed opposite to the top surface, a display unit disposed to be hinge-connected to the main body to rotate 360 degrees, and having a front surface to display images and a rear surface disposed opposite to the top surface, and a position fixing unit to fix the main body and the display unit at a first position where the top surface of the main body and the front surface of the display unit are in contact with each other and at a second position where the bottom surface of the main body and the rear surface of the display unit are in contact with each other by using a magnetic force.