POLARIZER AND IMAGE DISPLAY DEVICE

To provide a polarizer including a retardation plate having a plurality of retardation layers each containing a cured product of a liquid crystal compound, the polarizer having excellent durability against peeling force applied when a base material is peeled.SOLUTION: A polarizer is formed by laminating a linear polarizer, a first bonding layer and a retardation plate in this order. The retardation plate includes a first retardation layer and a second retardation layer, where the first retardation layer and the second retardation layer each contains a cured product of a liquid crystal compound and has a puncture modulus of elasticity of 70 g/mm or more. The first bonding layer has a tensile modulus of elasticity of 1.0×108 Pa or less at 23°C and 55% relative humidity.SELECTED DRAWING: Figure 1 【課題】液晶化合物の硬化物を含む位相差層を複数有する位相差板を備えた偏光板であって、基材剥離時に付加される剥離力に対する耐久性に優れた偏光板を提供する。【解決手段】直線偏光板と、第１貼合層と、位相差板と、がこの順に積層されてなる偏光板であって、前記位相差板は、第１位相差層と第２位相差層とを有し、前記第１位相差層及び前記第２位相差層は液晶化合物の硬化物を含み、突き刺し弾性率が７０ｇ／ｍｍ以上であり、前記第１貼合層は、温度２３℃、相対湿度５５％での引張弾性率が１．０×１０８Ｐａ以下である、偏光板。【選択図】図１