The present invention discloses a pixel unit and an array substrate. The pixel unit comprises: a plurality of pixel electrodes, including oblique pixel electrodes extending obliquely and transverse pixel electrodes located on edges of the oblique pixel electrodes and extending transversely, the plurality of pixel electrodes forming a display region having an opening region; and, a conductive unit which is located within the opening region and partially overlapped with projections of the oblique pixel electrodes, one corner of the conductive unit close to the oblique pixel units being an unfilled corner or a round corner. Accordingly, the impact of an electric field around the opening region on the electric field of the oblique pixel electrodes is reduced, and the impact on the liquid crystal orientation of the opening region is reduced; the dark fringe of pixels is improved; the aperture ratio of pixels is increased; and the quality of display is improved.