A communication terminal (40) for communicating with a counterpart communication terminal (10) includes a receiver (41) that receives image data including an eye image of a user operating the counterpart communication terminal (10) from the counterpart communication terminal (10), the eye image of the user being captured at the counterpart communication terminal (10) while the user is viewing a predetermined position on a counterpart display (217), a position specification unit (45a) that specifies a sightline position indicating a sightline position of the user operating the counterpart communication terminal (10) based on the received image data every time the image data is received by the receiver (41) and determine a frequency of changes in the specified sightline position for a predetermined time period, and a display controller (43) that displays information indicating the frequency of changes in the specified sightline position on a display (217).
