PURPOSE: To provide a sightseeing excursion boat system preventing sightseeing excursion boats from deviating from a sightseeing route, easy to monitor them, and easy to evacuate and move them at the time of a disaster.

CONSTITUTION: Multiple sightseeing excursion boats 1 are longitudinally connected via towing cords 2 circularly in sequence, a guide rail 3 is circularly installed on the water bottom or the sea bottom, the sightseeing excursion boats 1 are removably connected to moving pieces traveled on the guide rail 3 with guide cords, and a propelling force applying mechanism applying the propelling force to the sightseeing excursion boats 1 on the water surface or the sea surface on a circulatory excursion path is provided.