Portable electronic apparatus includes a display unit (ELD); a first sensor element group (G1) having a plurality of sensor elements (L1-L4) for detecting a contact and arranged continuously around the display unit side by side; a switch element formed where the first sensor element group is arranged; and a control unit for controlling the portable electronic apparatus to display a plurality of selection candidate items which can be displayed as an operation target region on the display unit, to monitor a change in a detection state of the first sensor element group and a state of the switch element, to change a selection state of a selection candidate item by changing the selection candidate items and/or the operation target region based on the change in the detection state of the first sensor element group, and to execute a selection candidate item in the selection state when the switch element is pressed.