An acoustic guiding system of this invention comprises: an n-phase signal wiring which contains n wire lines and a common ground where n is an integer larger than or equals to three; a sound source which generates an electric current for a signal sound; a distributer which distributes the electric current from the sound source to each line of the n-phase signal wiring repeatedly; a controller which controls the signal sound in accordance with signal information required for traffic control or the like; and speakers connected to each line of the n phase signal wiring in the order of the phase number.