The present invention provides a pixel unit. The pixel unit includes: a pixel defining layer, a pixel electrode, a light-emitting layer and a common electrode. The pixel electrode includes a bottom surface and a side surface, and the side surface extends along the side wall of the second via hole to the second via hole. On the top of the side wall, the light emitting layer is formed on the pixel electrode and covers the pixel defining layer, and the common electrode is formed on the light emitting layer, covering the light emitting layer and extending along the top surface of the pixel defining layer. The pixel unit of the present invention greatly reduces the light scattered from the light-emitting layer to the surroundings, greatly improves the color mixing phenomenon between the pixel units, effectively solves the color mixing problem caused by light scattering, increases the light-emitting area of the pixel unit, and improves the The overall brightness reduces the cost of the mask and greatly reduces the cost of the entire process, improves the production capacity, and improves the luminous effect.