An array substrate of a liquid crystal display (LCD) device and a method for fabricating the same is disclosed, to decrease the unit cost and time of fabrication by decreasing the usage count of mask, which includes simultaneously forming a gate line, a gate electrode and a pixel electrode on a substrate; depositing a gate insulating layer and an active layer on an entire surface of the substrate including the gate line; patterning the gate insulating layer and the active layer to remain on the gate line and the gate electrode; selectively removing the active layer above the gate line; forming a data line perpendicular to the gate line and source/drain electrodes; and depositing a passivation layer on the entire surface of the substrate including the data line.