superabsorbent polymer comprising a crosslinked polymer resulting from polymerization and internal crosslinking of a monomer composition comprising 20 wt% to 90 wt% of acrylic acid-based monomers having acidic groups which are at least partially neutralized, and a surface crosslinking layer formed on the surface of the crosslinked polymer, wherein the acrylic acid-based monomer is represented by the following Chemical Formula 1: [Chemical Formula 1] R 1 -COOM 1 wherein R 1 is an alkyl group containing an unsaturated bond and having 2 to 5 carbon atoms, and M 1 is a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine salt, wherein the superabsorbent polymer has centrifuge retention capacity (CRC), measured according to EDANA WSP 241.2, as 29.5 g/g or more, absorbency under load (AUL), measured at 6.2 kPa (0.9 psi) according to EDANA WSP 241.3, as 18 g/g or more, gel bed permeability (GBP), measured as disclosed in the specification, as 593x10 -9 cm 2 (60 Darcy) or more, and 5-min gel-AUL, measured as disclosed in the specification, as 18.0 g/g or more, wherein a ratio (A:B), measured as disclosed in the specification, of a total pore area (A) of pores having a diameter of 5 μm to 100 μm and a total pore area (B) of pores having a diameter of 100 μm to 400 μm in the superabsorbent polymer is 3:7 to 9:1, and wherein a low-temperature foaming agent and a high-temperature foaming agent are dispersed in the crosslinked polymer, wherein the low-temperature foaming agent is sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, calcium carbonate, or magnesium carbonate, and the high-temperature foaming agent is azodicarbonamide (ADCA), dinitroso pentamethylene tetramine (DPT), p,p'-oxybisbenzenesulfonylhydrazide (OBSH), p-toluenesulfonyl hydrazide (TSH), or sugar ester. R 1 is an alkyl group containing an unsaturated bond and having 2 to 5 carbon atoms, and M 1 is a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine salt, wherein the superabsorbent polymer has centrifuge retention capacity (CRC), measured according to EDANA WSP 241.2, as 29.5 g/g or more, absorbency under load (AUL), measured at 6.2 kPa (0.9 psi) according to EDANA WSP 241.3, as 18 g/g or more, gel bed permeability (GBP), measured as disclosed in the specification, as 593x10 -9 cm 2 (60 Darcy) or more, and 5-min gel-AUL, measured as disclosed in the specification, as 18.0 g/g or more, wherein a ratio (A:B), measured as disclosed in the specification, of a total pore area (A) of pores having a diameter of 5 μm to 100 μm and a total pore area (B) of pores having a diameter of 100 μm to 400 μm in the superabsorbent polymer is 3:7 to 9:1, and wherein a low-temperature foaming agent and a high-temperature foaming agent are dispersed in the crosslinked polymer, wherein the low-temperature foaming agent is sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, calcium carbonate, or magnesium carbonate, and the high-temperature foaming agent is azodicarbonamide (ADCA), dinitroso pentamethylene tetramine (DPT), p,p'-oxybisbenzenesulfonylhydrazide (OBSH), p-toluenesulfonyl hydrazide (TSH), or sugar ester. <EOS>