The invention provides a pixel structure which comprises a plurality of pixel units. A transparent electrode is arranged in each pixel unit and comprises at least two sub-electrode portions arranged in the array direction. A plurality of slits are formed in each sub-electrode portion, extension directions of the slits applied to the adjacent two sub-electrode portions in the same array are different, and at least two kinds of extension directions of the slits in at least one sub-electrode portion are included. Correspondingly, the invention further provides an array substrate and a display device. Cross stripes occurring during watching in certain watching direction can be prevented, and therefore the angle of view is improved. Besides, the transparent electrode is of a polygonal structure, so that the pixel structure is applicable to screens of special shapes such as circle and polygon, and the range of application of the display device is expanded.