A self-propelled dust-collecting robot includes a main body having wheels, a dust-collecting unit collecting dust on a floor surface, infrared sensors each including an infrared transmission element that emits infrared light toward the floor surface and an infrared reception element that receives the infrared light reflected at the floor surface, and a controller controlling the wheels on the basis of a reflectance of the infrared light obtained from each infrared sensor. The controller, during running, determines whether the reflectance is higher than or equal to a predetermined threshold value. Upon determining that the reflectance is higher than or equal to the threshold value, the controller controls the wheels to perform an avoidance action with the position where the reflectance is detected being a virtual wall, thereby to control the self-propelled dust-collecting robot to perform cleaning within a cleaning range defined by a reflection member.