Provided is a pixel unit. A storage capacitor is provided at an array substrate. The storage capacitor comprises a first electrode (21) provided at a first metal layer and a second electrode (22) provided at a second metal layer. An insulating layer is provided between the first electrode (21) and the second electrode (22). The second electrode (22) and the first electrode (21) overlap with each other to form a first overlapped region. Provided a displacement of the second electrode (22) with respect to the first electrode (21) is within a preset distance range, an area of the first overlapped region remains consistent, thereby preventing inconsistency in storage capacitances resulting from differences in assembling precision, and accordingly preventing moiré from occurring as a result thereof. Also provided is an array substrate comprising the pixel unit.