Provided is a liquid crystal display manufacturing method that is capable of improving the aperture ratio while suppressing unevenness in the display. The present invention is a method of manufacturing a liquid crystal display provided with an array substrate including an insulating layer, a source bus line and a pixel electrode, in which the source bus line and pixel electrode are provided on the insulating layer, and the source bus line includes a lower layer and an upper layer layered onto the lower layer. This manufacturing method includes a first photolithography step for using a first photomask to pattern the first conductive film, and, after the first photolithography step, a second photolithography step for using a second photomask to pattern at least a second conductive film and forming the source bus line and the pixel electrode. In the first photolithography step, the first conductive film is removed in at least an opening region without being removed at least in the region where the lower layer is formed, and the lower layer and upper layer are formed of the first conductive film and a second conductive film, respectively.