The present invention relates to a polarizing plate including: a polarizer; and a protective layer formed on at least one surface of the polarizer, in which the protective layer is a cured product of a radical curable composition including: (A) a radical polymerizable compound having at least one hydrophilic functional group in a molecule thereof; (B) a phosphate-based compound having three (meth)acryl groups in a molecule thereof; and (C) a radical initiator, and an image display device including the same.