A solvent free-type photocurable resin composition for a polarizing plate protective layer comprising: an acryl-based prepolymer comprising a (meth)acrylate-based monomer as a polymerization unit, wherein the acryl-based prepolymer comprises a (meth)acrylate-based monomer and a reactive monomer, wherein the reactive monomer comprises a hydroxyl group, wherein the monomer mixture comprise the (meth)acrylate-based monomer in 70 parts by weight to 99 parts by weight and the reactive monomer in 1 part by weight to 30 parts by weight based on 100 parts by weight of the monomer mixture, and preferably comprise the (meth)acrylate-based monomer in 90 parts by weight to 99 parts by weight and the reactive monomer in 1 part by weight to 10 parts by weight; and an isocyanate-based crosslinking agent, wherein the acryl-based prepolymer is in a partially polymerized state, and wherein the solvent free-type photocurable resin composition has a viscosity at 25°C of greater than or equal to 50 cPs and less than or equal to 300 cPs, wherein the viscosity may be measured for 5 minutes at room temperature (25°C) and in a No. 18 spindle using a Brookfield viscometer, wherein the isocyanate-based crosslinking agent has an isocyanate (-NCO) functional group and an acrylate functional group at the same time, wherein the isocyanate-based crosslinking agent is included in 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the acryl-based prepolymer, wherein the acryl-based prepolymer has a weight average molecular weight of greater than or equal to 300,000 and less than or equal to 2,000,000, wherein the average molecular weight is relating to molecular weight distribution and is obtained through conversion using a gel permeation chromatography (GPC) method. an acryl-based prepolymer comprising a (meth)acrylate-based monomer as a polymerization unit, wherein the acryl-based prepolymer comprises a (meth)acrylate-based monomer and a reactive monomer, wherein the reactive monomer comprises a hydroxyl group, wherein the monomer mixture comprise the (meth)acrylate-based monomer in 70 parts by weight to 99 parts by weight and the reactive monomer in 1 part by weight to 30 parts by weight based on 100 parts by weight of the monomer mixture, and preferably comprise the (meth)acrylate-based monomer in 90 parts by weight to 99 parts by weight and the reactive monomer in 1 part by weight to 10 parts by weight; and an isocyanate-based crosslinking agent, wherein the acryl-based prepolymer is in a partially polymerized state, and wherein the solvent free-type photocurable resin composition has a viscosity at 25°C of greater than or equal to 50 cPs and less than or equal to 300 cPs, wherein the viscosity may be measured for 5 minutes at room temperature (25°C) and in a No. 18 spindle using a Brookfield viscometer, wherein the isocyanate-based crosslinking agent has an isocyanate (-NCO) functional group and an acrylate functional group at the same time, wherein the isocyanate-based crosslinking agent is included in 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the acryl-based prepolymer, wherein the acryl-based prepolymer has a weight average molecular weight of greater than or equal to 300,000 and less than or equal to 2,000,000, wherein the average molecular weight is relating to molecular weight distribution and is obtained through conversion using a gel permeation chromatography (GPC) method. <EOS>