An organic compound and a charge-transporting material which are excellent in both a hole-transporting property and an electron-transporting property and have excellent electrical oxidation/reduction durability and a high triplet excitation level are provided, and an organic electroluminescent device which uses this organic compound and has high luminous efficiency and high driving stability and long lifetime is provided. One molecule of the organic compound has two or more partial structures represented by the following Formula (I): ##STR00001## wherein Cz denotes a carbazolyl group; Z denotes a direct link or an optional linking group; N atoms present in one molecule do not conjugate with each other excepting between N atoms in the same B.sup.1 rings; one molecule contains only one pyridine ring; one molecule contains a plurality of Q's; and Q denotes a direct link connected to G present in a moiety represented by the following Formula (II): ##STR00002## wherein B.sup.1 ring is a six-membered aromatic heterocycle containing n N atoms as a hetero atom; n is an integer of 1 to 3; when G is linked to Q, the G denotes a direct link or an optional linking group which links to Q; when G is not linked to Q, the G denotes an aromatic hydrocarbon group; G's are bound to C atoms in ortho-position and para-position with respect to the N atom in B.sup.1 ring; and m is an integer of 3 to 5.