To fully prevent the device from electrostatic breakage during and after assembling.

In the manufacturing method of a display device which drives display cells by an active matrix substrate which has plural row lines A, plural column lines crossing these row lines, and switching elements C each at the crossing points between these row lines and column lines, during and after assembling, a short-circuit line GL is laid in the peripheral section of the active matrix substrate. The end section of each of the row lines and the column lines is connected to the short-circuit line GL through a resistor.