a data transmission system using a human body as a signal transmission path includes a transmitter and a receiver . the transmitter uses a pair of electrodes which are held in close proximity to the skin of the human body . the transmitter transmits data to the receiver through the signal transmission path partly extending through the human body when a user carrying the transmitter touches a touch electrode of the receiver . the electrodes are integrated into a garment worn by the user in such a manner that the electrodes are kept in a closely facing relation to the skin of the user , thereby establishing the electrical path extending through the human body . with the integration of the two electrodes into the garment , the user wearing the garment as an everyday clothes or uniform can be easy and convenient to carry the transmitter for successful transmission of the data .