A photosensitive composition comprising: a) a triazine-based photoactive compound containing oxime ester represented by the following formula or formula E in the amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total photosensitive composition; b) a polymerizable compound having an ethylenically unsaturated bond in the amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total photosensitive composition, c) an alkali-soluble resin binder in the amount of 1 to 20 parts by weight based on 100 parts by weight of the total photosensitive composition; and d) a solvent in the amount of 10 to 95 parts by weight based on 100 parts by weight of the total photosensitive composition, wherein n is an integer of I or 2; when n=1, R is selected from the group consisting of a C 1 to C 6 alkyl group, a C 1 to C 6 haloalkyl group, a C 1 to C 6 alkyl group substituted with at least one group selected from the group consisting of NL 2, OL and SL wherein L is a hydrogen atom or C 1 to C 6 alkyl group, a phenyl group unsubstituted or substituted with at least one group selected from the group consisting of a C 1 to C 6 alkyl group, a halogen atom, a nitrile group, OH and COOH, and a C 2 to C 5 alkylcarboxyl group; when n=2, R is selected from the group consisting of a C 2 to C 6 alkylene group, a 1,2-phenylene group, a 1,3-phenylene group, a 1,4-phenylene group, wherein * is a linking moiety; R' is selected from the group consisting of a hydrogen atom, a C 1 to C 6 alkyl group, a nitrile group and a phenyl group; X is a C 5 to C 20 arylene group unsubstituted or substituted with at least one group selected from the group consisting of a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group; a divalent C 4 to C 20 heterocyclic group containing O, N or S, unsubstituted or substituted with at least one group selected from the group consisting of a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group; or a compound of the following formula: wherein Z and Z' are each independently one selected from the group consisting of CH 2, O, S, NR" wherein R" is a hydrogen atom or C 1 to C 6 alkyl group, and CH=CH; 1 and m are an integer of 0 to 2, provided that 1+m is 2; A is a simple linkage, or one selected from the group consisting of C p H 2p, O(CH 2 O) p, CH=CH, NR"', S, O, S=O, SO 2, and C=O wherein p is an integer of 1 to 6 and R'" is a hydrogen atom or C 1 to C 6 alkyl group; and Y and Y' are each selected from the group consisting of a hydrogen atom, a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group. a) a triazine-based photoactive compound containing oxime ester represented by the following formula or formula E in the amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total photosensitive composition; b) a polymerizable compound having an ethylenically unsaturated bond in the amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total photosensitive composition, c) an alkali-soluble resin binder in the amount of 1 to 20 parts by weight based on 100 parts by weight of the total photosensitive composition; and d) a solvent in the amount of 10 to 95 parts by weight based on 100 parts by weight of the total photosensitive composition, wherein n is an integer of I or 2; when n=1, R is selected from the group consisting of a C 1 to C 6 alkyl group, a C 1 to C 6 haloalkyl group, a C 1 to C 6 alkyl group substituted with at least one group selected from the group consisting of NL 2, OL and SL wherein L is a hydrogen atom or C 1 to C 6 alkyl group, a phenyl group unsubstituted or substituted with at least one group selected from the group consisting of a C 1 to C 6 alkyl group, a halogen atom, a nitrile group, OH and COOH, and a C 2 to C 5 alkylcarboxyl group; when n=2, R is selected from the group consisting of a C 2 to C 6 alkylene group, a 1,2-phenylene group, a 1,3-phenylene group, a 1,4-phenylene group, wherein * is a linking moiety; R' is selected from the group consisting of a hydrogen atom, a C 1 to C 6 alkyl group, a nitrile group and a phenyl group; X is a C 5 to C 20 arylene group unsubstituted or substituted with at least one group selected from the group consisting of a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group; a divalent C 4 to C 20 heterocyclic group containing O, N or S, unsubstituted or substituted with at least one group selected from the group consisting of a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group; or a compound of the following formula: wherein Z and Z' are each independently one selected from the group consisting of CH 2, O, S, NR" wherein R" is a hydrogen atom or C 1 to C 6 alkyl group, and CH=CH; 1 and m are an integer of 0 to 2, provided that 1+m is 2; A is a simple linkage, or one selected from the group consisting of C p H 2p, O(CH 2 O) p, CH=CH, NR"', S, O, S=O, SO 2, and C=O wherein p is an integer of 1 to 6 and R'" is a hydrogen atom or C 1 to C 6 alkyl group; and Y and Y' are each selected from the group consisting of a hydrogen atom, a halogen atom, CN, a C 1 to C 6 alkyl group, a C 1 to C 6 alkoxy group, a C 1 to C 6 alkylthio group and a morpholino group.