A data wiring is provided on a glass substrate in an active element substrate. For the data wiring, a first portion, extending in a direction that slopes and forms a fixed angle with respect to the rubbing direction of an oriented film, and a second portion, extending in a direction sloping to the opposite side of the first portion are alternately arranged and formed in a zigzag pattern. A convex insulation film is formed in a zigzag pattern to cover the data wiring and a common electrode is formed in a zigzag pattern to cover the insulation film. A shilding layer is formed in a zigzag pattern on an opposing substrate to completely cover the insulation film and does not protrude from the region directly above the common electrode. The high-contrast, multi-domain system in-plane switching type liquid crystal display device obtained with a high numerical aperture and low black brightness.