A composition for optical elements, including a negative optical dispersion compound represented by the following Chemical Formula 1; and a reactive mesogenic compound having at least one polymerizable functional group represented by the following Chemical Formula 3: in Chemical Formula 1, A is a C 6 -C 20 aromatic group; E 1, E 2, D 1, and D 2 are independently a single bond, -COO-, or -OCO-, L 1 and L 2 are independently -H, C 1 -C 20 alkyl or -S p -P, wherein at least one of said L 1 and L 2 is -S p -P, said P is CH 2 =CH-COO- or CH 2 =CH-CO-, said S p is a C 1 -C 20 alkylene; m and n are independently an integer of 1 to 5, wherein if said m or n is 2 or more, each repeating unit of -(D 1 -G 1)- or -(G 2 -D 2)- repeating twice or more may be the same as or different from each other; and G 1 and G 2 are independently a C 5 -C 8 non-aromatic carbocyclic group or a C 6 -C 20 aromatic group, wherein at least one of said G 1 and G 2 is the carbocyclic or heterocyclic group and any one of hydrogens included in the carbocyclic group is substituted by the group represented by the following Chemical Formula 2: wherein, in Chemical Formula 2, p is an integer of 1 to 10, wherein if said p is 2 or more, each repeating unit of -(Q 1)-repeating twice or more may be the same as or different from each other, -(Q 1)- is and B 1 is -H or a C 2 -C 8 alkynyl group. in Chemical Formula 3, P is a polymerizable group, S p is a spacer group or a single bond, X is -O-, -S-, -CO-, -COO-, -OCO-, -OCOO-, or a single bond, n is 0 or 1, MG is a mesogenic group, and R is a C 1 -C 25 alkyl radical, a halogen, cyano, or a group having the meaning given to said P-(S p- X) n -, and one or more non-adjacent CH 2 groups in said alkyl radical may be independently replaced by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -OCO-O-, -S-CO-, -CO-S-, or -C≡C- in the way of that oxygen atoms are not connected directly to each other. A is a C 6 -C 20 aromatic group; E 1, E 2, D 1, and D 2 are independently a single bond, -COO-, or -OCO-, L 1 and L 2 are independently -H, C 1 -C 20 alkyl or -S p -P, wherein at least one of said L 1 and L 2 is -S p -P, said P is CH 2 =CH-COO- or CH 2 =CH-CO-, said S p is a C 1 -C 20 alkylene; m and n are independently an integer of 1 to 5, wherein if said m or n is 2 or more, each repeating unit of -(D 1 -G 1)- or -(G 2 -D 2)- repeating twice or more may be the same as or different from each other; and G 1 and G 2 are independently a C 5 -C 8 non-aromatic carbocyclic group or a C 6 -C 20 aromatic group, wherein at least one of said G 1 and G 2 is the carbocyclic or heterocyclic group and any one of hydrogens included in the carbocyclic group is substituted by the group represented by the following Chemical Formula 2: p is an integer of 1 to 10, wherein if said p is 2 or more, each repeating unit of -(Q 1)-repeating twice or more may be the same as or different from each other, -(Q 1)- is and B 1 is -H or a C 2 -C 8 alkynyl group. P is a polymerizable group, S p is a spacer group or a single bond, X is -O-, -S-, -CO-, -COO-, -OCO-, -OCOO-, or a single bond, n is 0 or 1, MG is a mesogenic group, and R is a C 1 -C 25 alkyl radical, a halogen, cyano, or a group having the meaning given to said P-(S p- X) n -, and one or more non-adjacent CH 2 groups in said alkyl radical may be independently replaced by -O-, -S-, -NH-, -N(CH 3)-, -CO-, -COO-, -OCO-, -OCO-O-, -S-CO-, -CO-S-, or -C≡C- in the way of that oxygen atoms are not connected directly to each other.