Polarizing plate with retardation layer having reverse dispersion characteristics for suppressing the occurrence of appearance defects in a high-temperature and high-humidity environment

The object of the present invention is to provide a polarizing plate with a retardation layer, in which the polarizing plate includes a retardation layer having reverse dispersion characteristics and can suppress the occurrence of appearance defects in a high-temperature and high-humidity environment. The polarizing plate with a retardation layer according to an embodiment of the present invention is sequentially provided with a polarizing element and a retardation layer containing a cellulose-based resin and an ester-based resin. The retardation layer has an Re(450)/Re(550) of 0 to 1, and an Re(550) of 100nm-200nm, and an angle formed by an absorption-axis direction of the polarizing element and a slow axis direction of the retardation layer is 40 DEG to 50 DEG or 130 DEG to 140 DEG. A nano-phase separation structure is formed in the retardation layer.