An object of the present invention is to realize mutual adaptation for mutual synchronizing in a man-machine system and make it applicable to the site of walking aid. A walking aid system of the present invention comprises: a sensor section (2) for sensing the motion rhythm of a walker, a recording section (33) for recording values of measurements of the motion rhythm sensed with the sensor section 2, a target setting section (34) for setting a target value for the motion rhythm of the walker, a timing generating section (36) for generating a timing signal according to the difference between the measurement and the target value, and a stimulus generating section (4) for generating rhythm stimulus that is recognizable by the walker, according to the timing signal generated with the timing generating section (36).
