The disclosure provides a flexible polarizer, including a polarizing layer, a first protective layer, and a second protective layer. The polarizing layer has a first surface and a second surface opposite to each other. The first protective layer is disposed on the first surface and comprises polyvinylidene difluoride (PVDF) or a kind of high phase retardation plastics. The second protective layer is disposed on the second surface and comprises PVDF or a kind of the high phase retardation plastics. The first protective layer, the second protective layer, and the polarizing layer are configured to be bent along a bend line.