An active matrix type display device includes inter-pad short-circuiting lines which are connected with signal lines, terminal portions which transmit signals from an IC chip to the signal lines, and a plurality of short-circuiting lines which are arranged outside the terminal portions and inside an end surface of a substrate and are connected with a plurality of inter-pad short-circuiting lines, wherein cut regions of the inter-pad short-circuiting lines are arranged outside the terminal portions and inside the short-circuiting lines. Since repair lines and signal-line lead line do not cross each other, it is possible to perform the highly reliable repair in respective manufacturing steps.