A light wave generating device includes a head mounted body and two light source modules. The head-mounted body can be used to hang on the user's head, and the two light source modules are respectively disposed on the two sides of the head-mounted body through an adjustment mechanism, and the two light source modules can be moved and adjusted on the head-mounted body, The light source modules each include a plurality of light emitting elements. Thereby, the light can be irradiated to the facial paralysis and peripheral nerves of the user for promoting blood circulation, and has an adjustment function for elastically changing the irradiation site.
