A liquid crystal display device having thin film transistors which can alleviate the required alignment accuracy of a semiconductor film while suppressing the generation of an optical leak current is provided. The liquid crystal display device includes: a transparent substrate; gate electrodes which are stacked above the transparent substrate; source electrodes and drain electrodes which are stacked above the gate electrodes; and semiconductor films each of which is stacked above the gate electrode and controls an electric current between the source electrode and the drain electrode based on an electric field generated by the gate electrode, wherein the semiconductor film is formed into a planar shape, and includes a first region which overlaps with the gate electrode in plane and a second region which does not overlap with the gate electrode in plane, and the source electrode and the drain electrode are not connected to the semiconductor film in the second region, and are connected to the semiconductor film in the first region.