A power source line 1 and a scanning line 3 are arranged on different wiring layers so as to be orthogonal to each other. In the wiring layer on which the scanning line 3 is arranged, a bypass line 111 is arranged on at least a part of a portion obtained by removing a planar position of the scanning line 3 from a planar position of the power source line 1. Contacts 121 and 122 establish electric connection between the power source line 1 and the bypass line 111. As described above, the bypass line 111 is connected to the power source line 1 in parallel, leading to decrease in resistance of the power source line 1 and suppression of unevenness in brightness at a display screen. Moreover, an additional manufacturing step for providing the bypass line 111 is unnecessary. Further, an aperture ratio is not reduced even when the bypass line 111 is provided. When the bypass line 111 is made wider than the power source line 1, a pixel circuit can be prevented from operating erroneously due to external light.