A pixel structure is provided. The pixel structure includes a control device, a main pixel electrode, and a sub pixel electrode. The main pixel electrode is electrically connected to the control device, and the main pixel electrode has a plurality of main pixel slits where the width thereof is S. The sub pixel electrode is electrically connected to the control device, and the sub pixel electrode has a first electrode pattern and a second electrode pattern. The first electrode pattern has a plurality of first slits where the width S1 thereof is equal to or greater than the width S of the main pixel slits. The second electrode pattern has no slits or has a plurality of second slits where the width S2 thereof is less than the width S of the main pixel slits. A pixel array including the pixel structure is also provided.