A near-infrared absorber, comprising: a compound represented by Chemical Formula 1: wherein, in Chemical Formula 1, Ar is a benzene ring, X 1 is S, Se, Te, S(=O), S(=O) 2, X 2 is O, S, Se, Te, CR x -CR y, CR xx -CR yy, or S(=O), wherein R x and R y are independently hydrogen, deuterium, a C1 to C30 alkyl group, a C1 to C30 haloalkyl group, a C6 to C30 aryl group, a C6 to C30 aryloxy group, a C3 to C30 heteroaryl group, a halogen, or a cyano group, R xx and R yy are independently v, wherein v is a positive integer, or at least one heteroatom of O, N, S, Se, or Te, and R xx and R yy are linked to each other to form an aromatic ring or a heteroaromatic ring, Ar 1 and Ar 2 are the same or different and are represented by Chemical Formula C-1-1 including at least one aromatic ring: wherein, in Chemical Formula C-1-1, Y' is O, S, Se, Te, and an * outside the at least one aromatic ring is a linking point with Ar of Chemical Formula 1, and *'s inside the at least one aromatic ring are linking portions with an N(R 1)-containing ring that includes R 1 of Chemical Formula 1 and an N(R 2)-containing ring that includes R 2 of Chemical Formula 1; Ar 3 and Ar 4 are independently a substituted or unsubstituted C6 to C30 arene group or a substituted or unsubstituted C3 to C30 heteroarene group, R 1 and R 2 are independently hydrogen, deuterium, a halogen, a cyano group, a nitro group, a hydroxyl group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C6 to C10 aryl group, or a substituted or unsubstituted C3 to C10 heteroaryl group, and L 1 and L 2 are a single bond. a compound represented by Chemical Formula 1: wherein, in Chemical Formula 1, Ar is a benzene ring, X 1 is S, Se, Te, S(=O), S(=O) 2, X 2 is O, S, Se, Te, CR x -CR y, CR xx -CR yy, or S(=O), wherein R x and R y are independently hydrogen, deuterium, a C1 to C30 alkyl group, a C1 to C30 haloalkyl group, a C6 to C30 aryl group, a C6 to C30 aryloxy group, a C3 to C30 heteroaryl group, a halogen, or a cyano group, R xx and R yy are independently v, wherein v is a positive integer, or at least one heteroatom of O, N, S, Se, or Te, and R xx and R yy are linked to each other to form an aromatic ring or a heteroaromatic ring, Ar 1 and Ar 2 are the same or different and are represented by Chemical Formula C-1-1 including at least one aromatic ring: wherein, in Chemical Formula C-1-1, Y' is O, S, Se, Te, and an * outside the at least one aromatic ring is a linking point with Ar of Chemical Formula 1, and *'s inside the at least one aromatic ring are linking portions with an N(R 1)-containing ring that includes R 1 of Chemical Formula 1 and an N(R 2)-containing ring that includes R 2 of Chemical Formula 1; Ar 3 and Ar 4 are independently a substituted or unsubstituted C6 to C30 arene group or a substituted or unsubstituted C3 to C30 heteroarene group, R 1 and R 2 are independently hydrogen, deuterium, a halogen, a cyano group, a nitro group, a hydroxyl group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C6 to C10 aryl group, or a substituted or unsubstituted C3 to C10 heteroaryl group, and L 1 and L 2 are a single bond. Ar is a benzene ring, X 1 is S, Se, Te, S(=O), S(=O) 2, X 2 is O, S, Se, Te, CR x -CR y, CR xx -CR yy, or S(=O), wherein R x and R y are independently hydrogen, deuterium, a C1 to C30 alkyl group, a C1 to C30 haloalkyl group, a C6 to C30 aryl group, a C6 to C30 aryloxy group, a C3 to C30 heteroaryl group, a halogen, or a cyano group, R xx and R yy are independently v, wherein v is a positive integer, or at least one heteroatom of O, N, S, Se, or Te, and R xx and R yy are linked to each other to form an aromatic ring or a heteroaromatic ring, Ar 1 and Ar 2 are the same or different and are represented by Chemical Formula C-1-1 including at least one aromatic ring: wherein, in Chemical Formula C-1-1, Y' is O, S, Se, Te, and an * outside the at least one aromatic ring is a linking point with Ar of Chemical Formula 1, and *'s inside the at least one aromatic ring are linking portions with an N(R 1)-containing ring that includes R 1 of Chemical Formula 1 and an N(R 2)-containing ring that includes R 2 of Chemical Formula 1; Ar 3 and Ar 4 are independently a substituted or unsubstituted C6 to C30 arene group or a substituted or unsubstituted C3 to C30 heteroarene group, R 1 and R 2 are independently hydrogen, deuterium, a halogen, a cyano group, a nitro group, a hydroxyl group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C6 to C10 aryl group, or a substituted or unsubstituted C3 to C10 heteroaryl group, and L 1 and L 2 are a single bond. Y' is O, S, Se, Te, and an * outside the at least one aromatic ring is a linking point with Ar of Chemical Formula 1, and *'s inside the at least one aromatic ring are linking portions with an N(R 1)-containing ring that includes R 1 of Chemical Formula 1 and an N(R 2)-containing ring that includes R 2 of Chemical Formula 1; Ar 3 and Ar 4 are independently a substituted or unsubstituted C6 to C30 arene group or a substituted or unsubstituted C3 to C30 heteroarene group, R 1 and R 2 are independently hydrogen, deuterium, a halogen, a cyano group, a nitro group, a hydroxyl group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C6 to C10 aryl group, or a substituted or unsubstituted C3 to C10 heteroaryl group, and L 1 and L 2 are a single bond.