This research examined the interpersonal distances from others desired by couples sitting on a hill by the sea. An investigation to observe the behavior of actual couples, and an experiment to assess their feelings were carried out in the early evening and the nighttime. In the results, the following points were demonstrated. 1) The closest distance the couples could allow others to approach was 2 to 3 meters in all directions, and the distance at which couples were not annoyed by others was about 5 meters in all directions, 2) When the distances with others were within about 5 meters, the time a couple stayed in their spot was affected by others. The effects were stronger when the others were in front of a couple or behind them in the nighttime. 3) When the distances from others were within 5 to 6 meters, the couple's intimate contact was affected by others. The distances were a little larger in the early evening than in the nighttime, and women preferred larger distances than men.