A polarizing plate comprising a polarizing film; a hard coating layer formed on the top of the polarizing film; a retardation layer formed on the bottom of the polarizing film; and wherein the hard coating layer is formed directly on the top of the polarizing film without interposing other layers, wherein the polarizing film comprises a zinc component (Zn) wherein the hard coating layer comprises a polymerizable epoxy compound wherein the hard coating layer has pencil hardness of 0.5H or more, wherein the hard coating layer has a thickness in a range of 1μm to 10μm, and characterized in that the polarizing plate further comprises an isotropic layer, wherein the retardation layer is formed on the first surface of the isotropic layer, and the second surface of the isotropic layer is attached to the polarizing film by an UV adhesive layer, wherein the zinc component in the polarizing film is in a range of 0.1 to 10 wt%, wherein the hard coating layer further comprises an oxetane compound and wherein the reflective color value change (ΔE* ab) according to Equation 4 below is 10 or less: Δ E * ab = Δ L* 2 + Δ a * 2 + Δ b * 2 1 / 2 wherein, ΔL* is L* a -L* i, Δa* is a* a -a* i, Δb* is b* a -b* i, and L* a, a* a and b* a are color coordinates L*, a* and b* before exposing the polarizing plate to light having a wavelength of 420nm in a light quantity of 0.75 to 0.85W/m 2 at a temperature of 25°C for 50 hours, respectively, and L* i, a* i and b* i are color coordinates L*, a* and b* after exposing the polarizing plate to light having a wavelength of 420nm in a light quantity of 0.75 to 0.85W/m 2 at a temperature of 25°C for 50 hours. a hard coating layer formed on the top of the polarizing film; a retardation layer formed on the bottom of the polarizing film; and wherein the hard coating layer is formed directly on the top of the polarizing film without interposing other layers, wherein the polarizing film comprises a zinc component (Zn) wherein the hard coating layer comprises a polymerizable epoxy compound wherein the hard coating layer has pencil hardness of 0.5H or more, wherein the hard coating layer has a thickness in a range of 1μm to 10μm, and characterized in that the polarizing plate further comprises an isotropic layer, wherein the retardation layer is formed on the first surface of the isotropic layer, and the second surface of the isotropic layer is attached to the polarizing film by an UV adhesive layer, wherein the zinc component in the polarizing film is in a range of 0.1 to 10 wt%, wherein the hard coating layer further comprises an oxetane compound and wherein the reflective color value change (ΔE* ab) according to Equation 4 below is 10 or less: Δ E * ab = Δ L* 2 + Δ a * 2 + Δ b * 2 1 / 2 wherein, ΔL* is L* a -L* i, Δa* is a* a -a* i, Δb* is b* a -b* i, and L* a, a* a and b* a are color coordinates L*, a* and b* before exposing the polarizing plate to light having a wavelength of 420nm in a light quantity of 0.75 to 0.85W/m 2 at a temperature of 25°C for 50 hours, respectively, and L* i, a* i and b* i are color coordinates L*, a* and b* after exposing the polarizing plate to light having a wavelength of 420nm in a light quantity of 0.75 to 0.85W/m 2 at a temperature of 25°C for 50 hours.