An apparatus for rotating a webbing guide of a seat belt for a vehicle may include a drive unit for moving a cable connected at one end thereof by controlling driving of a motor in response to an actuating signal or a stop signal, the webbing guide connected to the other end of the cable, and hingedly rotated to a first direction of a vehicular body as the cable moves in a second direction, and a return unit provided on the webbing guide, and providing an elastic force to the webbing guide so that the webbing guide hingedly rotated to the first direction of the vehicular body returns to the second direction of the vehicular body when the motor stops driving.