Polarizing plate

A polarizing plate comprising:

• a polarizer;
• and
• an optical element that rotates a polarization plane of polarized light emitted from the polarizer,
• wherein an orientation direction on a surface of the optical element on a polarizer side is parallel to an absorption axis of the polarizer,
• an orientation direction on a surface of the optical element opposite to the polarizer is perpendicular to the absorption axis of the polarizer, and
• Δnd and a birefringence parameter RH of the optical element fall in a range of a region surrounded by Point A at which Δnd is 400 nm and the birefringence parameter RH is 0 degrees, Point B at which Δnd is 400 nm and the birefringence parameter RH is −11.6 degrees, Point C at which Δnd is 600 nm and the birefringence parameter RH is −24.9 degrees, and Point D at which Δnd is 600 nm and the birefringence parameter RH is 0 degrees in an orthogonal coordinate in which Δnd is indicated along a vertical axis and the birefringence parameter RH is indicated along a lateral axis,
• here, the region refers to a region surrounded by a straight line connecting Point A and Point B, a straight line connecting Point B and Point C, a straight line connecting Point C and Point D, and a straight line connecting Point D and Point A.