Display substrate, display panel, display device and mask plate

The utility model discloses a display substrate, a display panel, a display device and a mask plate. The display substrate comprises a plurality of pixel unit groups arranged in a matrix, and each pixel unit group comprises four pixel units; each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel which are arranged triangularly and have different colors; the four pixel units in the same pixel unit group are arranged in a rectangular shape at the same vertex, and the sub-pixel closest to the common vertex in the four pixel units is the first sub-pixel; and the colors of the sub-pixels which are adjacently arranged in different pixel unit groups are the same. According to the technical scheme provided by the embodiment of the utility model, each sub-pixel is continuously arranged with the other three sub-pixels with the same color, so that the four sub-pixels which are continuously arranged and have the same color can be prepared by adopting the same mask hole in the mask plate, th