A display panel, a polarizer and a display device are provided. The display panel includes a panel main body and a first polarizer disposed on at least one main surface of the panel main body. The first polarizer includes a first polarizing layer and a second polarizing layer which are stacked; a first polarizing region is formed on the first polarizing layer; a second polarizing region and a second light-transmitting region are alternately formed on the second polarizing layer; and an absorption axis direction of the second polarizing region is perpendicular to an absorption axis direction of the first polarizing region.