To provide a brain wave guide capable of effectively guiding brain waves by releasing discharging the stimulation of ultra-low-pitched sound waves lower than an audible range toward a human body by a small-sized simple structure.

The brain wave guide is provided with respective sine wave signal generating parts 1a and 1b for generating sine wave signals, a signal composition part 2 for composing the sine wave signals of different frequencies and a composite signal output part 3 for outputting composite signals as the stimulation which can be sensed by the human body, wherein the composition of the sine wave signals in the signal composition part 2 is constituted such that the differential frequency of the sine wave signals of the different frequencies is in the frequency band equal to or lower than a brain wave frequency.