The present disclosure relates to a vibration device configured to be integrated into a vehicle seat and comprising a vibrator capable of generating vibrations. This device further comprises an attachment mechanism capable of attaching the vibrator to the back or underside of a support layer integrated into a member of the seat, and a damper which is in contact with this support layer and with the vibrator, and which is capable of reducing, in the support layer, the vibrations generated by the vibrator.