A pixel structure disposed on a first substrate is provided. The pixel structure includes a scan line, a data line, an active component, a pixel electrode, a first dielectric layer, a common electrode, and a protrusion. The scan line and the data line are disposed on the first substrate. The pixel electrode is disposed on the first substrate. The first dielectric layer is disposed on the first substrate and covers the pixel electrode. The common electrode is disposed on the first dielectric layer, and the common electrode has at least two first branched electrodes and a first opening between the first branched electrodes. The first branched electrodes and the first opening on the first substrate overlap with the pixel electrode in a projection direction. The protrusion is disposed on the first dielectric layer, and the protrusion is disposed in the first opening between the first branched electrodes.