To solve a problem that it is not easy physically or economically to actually experience the dolphin therapy for getting rid of stress, relaxation, improving mentally stressful state or mental instability, or relieving the autistic syndrome or the neurosis.

A subject is made to virtually experience the dolphin therapy by exposure to the voice peculiar to dolphins introducing θ waves or showing the video image of dolphins by audio, sound and visual devices. In addition, the mental and physical fatigue of the subject is relieved with massage together with the above therapy using the devices.