To provide a gait analysis system for three-dimensionally measuring the movement of the legs of a walker and measuring and analyzing the spatial movement of a swinging leg without putting loads on the walker undergoing rehabilitation.

The gait analysis system is equipped with: a gait sensor mounted on one leg or both legs of the walker undergoing gait training rehabilitation for radio-outputting the detection data of at least one of an acceleration and an angular velocity; radio communication equipment for receiving the detection data; and a gait analyzer for calculating analysis items for the rehabilitation relating to the legs on the basis of the detection data acquired through the radio communication equipment.