NOVELTY - An organic electric device is obtained by sequentially laminating electrode (A), one or more organic material layer including composition (A) containing mixture of carbazole compound (I) and fluorene compound (II), and electrode (B).    USE - Organic electric device e.g. organic light emitting device, organic solar cell, organophotoreceptor and organic thin film transistor (all claimed).    ADVANTAGE - The organic electric device has excellent durability, high luminous efficiency, and low drive voltage.    DETAILED DESCRIPTION - An organic electric device is obtained by sequentially laminating electrode (A), one or more organic material layer including composition (A) containing mixture of carbazole compound of formula (I) and fluorene compound of formula (II), and electrode (B).    Ar1-Ar3=6-60C aryl, 5-60C heteroaryl which has at least one of O, N, and S, 1-30C alkoxy, 6-30C aryloxy, 6-60C arylamine, or 1-50C alkyl (all optionally substituted);    R1-R4=H, deuterium, halo, nitro, nitrile, amino, 6-60C aryl optionally substituted by H, deuterium, halo, amino, nitrile, nitro, 1-20C alkyl, 1-20C alkoxy, 1-20C alkylamine, 1-20C alkylthiophene, 6-20C arylthiopen, 2-20C alkenyl, 2-20C alkynyl, 3-20C cycloalkyl, 6-60C aryl, 2-20C aryl substituted by deuterium, 2-20C arylalkenyl, silane, boron, germanium or 5-20C heterocyclic group, 5-60C heteroaryl which has O, N, and S and which is optionally substituted by H, deuterium, halo, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 8-20C arylamine, 6-60C aryl, 2-20C aryl substituted by deuterium, 8-20C arylalkyl, 8-20C arylalkenyl, 5-20C heterocyclic group, nitrile or acetylene, 1-30C alkoxy optionally substituted by H, deuterium, halo, amino, nitrile, nitro, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 3-30C cycloalkyl, 2-30C heterocycloalkyl, 6-60C aryl, 2-20C aryl substituted by deuterium or 3-60C heteroaryl, 6-30C aryloxy optionally substituted by H, deuterium, halo, amino, nitrile, nitro, 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 3-30C cycloalkyl, 2-30C heterocycloalkyl, 6-60C aryl, 2-20C aryl substituted by deuterium, or 3-60C heteroaryl, or 1-50C alkyl optionally substituted by 1-20C alkyl, 2-20C alkenyl, 1-20C alkoxy, 6-20C aryl, 2-20C aryl substituted by deuterium, 8-20C arylalkyl, 8-20C arylalkenyl, 5-20C heterocyclic, nitrile, or acetylene;    or R1+R2=(un)saturated aliphatic ring or hetero ring;    L=6-60C arylene optionally substituted by nitro, nitrile, halo, alkyl, alkoxy, or amino, or 5-60C heteroarylene optionally substituted by nitro, nitrile, halo, alkyl, alkoxy, or amino;    a=1-4;    b=1-3;    c=0-2;    R',R"=6-60C aryl, or 1-50C alkyl (both optionally substituted);    d=1-3;and    e,f,g=1-4.    An INDEPENDENT CLAIM is included for composition (A).