A liquid crystal display protective plate (1, 2) comprising: a resin plate in which a substrate layer is laminated on both sides of a phase difference adjusting layer, wherein the phase difference adjusting layer comprises a transparent thermoplastic resin having an absolute value of photoelastic coefficient (C A) of 10.0 × 10 -12 /Pa or less and an absolute value of orientation birefringence (Δn A) of 10.0 × 10 -4 to 100.0 × 10 -4, the orientation birefringence being determined by uniaxially stretching a test specimen with a width of 20 mm, a length of 40 mm, and a thickness of 1 mm at a temperature 10°C higher than a glass transition temperature thereof, a rate of 3 mm/min, and a stretching ratio of 100% and then measuring an in-plane retardation value of a central portion of the test specimen, the substrate layer comprises a transparent thermoplastic resin having an absolute value of photoelastic coefficient (C B) of 10.0 × 10 -12 /Pa or less and an absolute value of orientation birefringence (Δn B) of less than 10.0 × 10 -4, the orientation birefringence being determined by uniaxially stretching a test specimen with a width of 20 mm, a length of 40 mm, and a thickness of 1 mm at a temperature 10°C higher than a glass transition temperature thereof, a rate of 3 mm/min, and a stretching ratio of 100% and then measuring an in-plane retardation value of a central portion of the test specimen, Tg A < Tg B, wherein Tg A represents the glass transition temperature of the phase difference adjusting layer, and Tg B represents the glass transition temperature of the substrate layer, and the resin plate has an in-plane retardation value of 50 to 330 nm. a resin plate in which a substrate layer is laminated on both sides of a phase difference adjusting layer, wherein the phase difference adjusting layer comprises a transparent thermoplastic resin having an absolute value of photoelastic coefficient (C A) of 10.0 × 10 -12 /Pa or less and an absolute value of orientation birefringence (Δn A) of 10.0 × 10 -4 to 100.0 × 10 -4, the orientation birefringence being determined by uniaxially stretching a test specimen with a width of 20 mm, a length of 40 mm, and a thickness of 1 mm at a temperature 10°C higher than a glass transition temperature thereof, a rate of 3 mm/min, and a stretching ratio of 100% and then measuring an in-plane retardation value of a central portion of the test specimen, the substrate layer comprises a transparent thermoplastic resin having an absolute value of photoelastic coefficient (C B) of 10.0 × 10 -12 /Pa or less and an absolute value of orientation birefringence (Δn B) of less than 10.0 × 10 -4, the orientation birefringence being determined by uniaxially stretching a test specimen with a width of 20 mm, a length of 40 mm, and a thickness of 1 mm at a temperature 10°C higher than a glass transition temperature thereof, a rate of 3 mm/min, and a stretching ratio of 100% and then measuring an in-plane retardation value of a central portion of the test specimen, Tg A < Tg B, wherein Tg A represents the glass transition temperature of the phase difference adjusting layer, and Tg B represents the glass transition temperature of the substrate layer, and the resin plate has an in-plane retardation value of 50 to 330 nm.