An amino fluorene polymer comprising a first repeating unit represented by Formula 1: wherein, in Formula 1, R 1 to R 3 are each independently selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 10 alkyl group, and a substituted or unsubstituted C 6 -C 30 aryl group and preferably independently selected from a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, and an n-butyl group; m1 is an integer from 1 to 20; F and F' are each independently selected from a substituted or unsubstituted azafluorenylene group and a substituted or unsubstituted fluorenylene group; n1 and n2 are each independently selected from 1 and 2; A is a group represented by Formula 2; R 4 is selected from a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a cyano group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 3 -C 16 cycloalkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 16 cycloalkoxy group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 40 aralkyl group, a substituted or unsubstituted C 5 -C 30 heteroaryl group, -Si(Q 1)(Q 2)(Q 3), and -N(Q 1)(Q 2); wherein, in Formula 2, L 1 and L 2 are each independently selected from a single bond, a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 3 -C 16 cycloalkylene group, a substituted or unsubstituted C 6 -C 30 arylene group, a substituted or unsubstituted C 1 -C 20 oxyalkylene group, a substituted or unsubstituted C 3 -C 16 oxycycloalkylene group, a substituted or unsubstituted C 6 -C 30 oxyarylene group, a substituted or unsubstituted C 7 -C 40 aralkylene group, a substituted or unsubstituted C 5 -C 30 heteroarylene group, -Si -, and -N -; n3 and n4 are each independently selected from 1 and 2; Ar 1 is selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 3 -C 16 cycloalkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 16 cycloalkoxy group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 40 aralkyl group, a substituted or unsubstituted C 5 -C 30 heteroaryl group, and -N(Q 6)(Q 7); wherein, Ar 1 optionally binds to F, F', L 1, or L 2 to form a ring; Q 1 to Q 7 are each independently selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, and a substituted or unsubstituted C 6 -C 30 aryl group; and * is a binding site to an adjacent atom. R 1 to R 3 are each independently selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 10 alkyl group, and a substituted or unsubstituted C 6 -C 30 aryl group and preferably independently selected from a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, and an n-butyl group; m1 is an integer from 1 to 20; F and F' are each independently selected from a substituted or unsubstituted azafluorenylene group and a substituted or unsubstituted fluorenylene group; n1 and n2 are each independently selected from 1 and 2; A is a group represented by Formula 2; R 4 is selected from a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a cyano group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 3 -C 16 cycloalkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 16 cycloalkoxy group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 40 aralkyl group, a substituted or unsubstituted C 5 -C 30 heteroaryl group, -Si(Q 1)(Q 2)(Q 3), and -N(Q 1)(Q 2); L 1 and L 2 are each independently selected from a single bond, a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 3 -C 16 cycloalkylene group, a substituted or unsubstituted C 6 -C 30 arylene group, a substituted or unsubstituted C 1 -C 20 oxyalkylene group, a substituted or unsubstituted C 3 -C 16 oxycycloalkylene group, a substituted or unsubstituted C 6 -C 30 oxyarylene group, a substituted or unsubstituted C 7 -C 40 aralkylene group, a substituted or unsubstituted C 5 -C 30 heteroarylene group, -Si -, and -N -; n3 and n4 are each independently selected from 1 and 2; Ar 1 is selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 3 -C 16 cycloalkyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 16 cycloalkoxy group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 40 aralkyl group, a substituted or unsubstituted C 5 -C 30 heteroaryl group, and -N(Q 6)(Q 7); wherein, Ar 1 optionally binds to F, F', L 1, or L 2 to form a ring; Q 1 to Q 7 are each independently selected from a hydrogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, and a substituted or unsubstituted C 6 -C 30 aryl group; and * is a binding site to an adjacent atom.