A stereo display includes a display panel, a first polarizer modulator disposed above the display panel, and a second polarizer modulator disposed above the first polarizer modulator. The second polarizer modulator includes a first lens set, a second lens set opposite to the first lens set, a polarization material, and a birefringent material. An angle between an extending direction of the first lens set and an extending direction of the second lens set is not 0 or 180 degrees. The polarization material is between the first lens set and the second lens set. The birefringent material is disposed in at least one of the first lens set and the second lens set.