A thin film transistor matrix device including an insulating substrate, a plurality of thin film transistors (TFTs) on the insulating substrate, and a plurality of picture element electrodes on the insulating substrate in a matrix to define an image display region. A first conducting film is on the insulating substrate. A first insulating film is on the first conducting film. A second conducting film is on the first insulating film, and a second insulating film is over the first insulating film and the second conducting film. A first conducting connection is formed, outside the image display region, to pass through the first and second insulating films, and to electrically connect the first conducting film to a third conducting film. A second conducting connection is formed, outside the image display region, to pass through the second insulating film and to electrically connect the second conducting film to the third conducting film.