A stereo display including a display panel and a light shieldable element is provided. The display panel has at least two sub-pixel regions. Each sub-pixel region is configured with at least a first pixel electrode to define a first sub-region. The light shieldable element is disposed in front of the sub-pixel regions. Each first pixel electrode has a first shieldable region shielded by the light shieldable element and a first non-shielding region exposed by the light shieldable element. The first shieldable region is closer to the scan line than the first non-shielding region. A horizontal direction is defined as a connection line of two eyes of a user watching the stereo display. A total length A of each sub-pixel region and a length B of the first shieldable region in a predetermined direction intersected to the horizontal direction comply with a relationship that (B/A)×100% is substantially from 1.61% to 47.9%.