Disclosed is an organic electroluminescent device (organic EL device) which has a simple structure and utilizes phosphorescence. The organic electroluminescent device is improved in luminous efficiency and secured of sufficient driving stability. Such an organic electroluminescent device comprises a light-emitting layer or a plurality of organic compound thin film layers including a light-emittinglayer formed between a pair of electrodes. The light-emitting layer contains a compound composed of an Al complex of an oxyphenylbenzoxazole which is represented by the general formula (I) below as ahost material, while containing an organic metal complex including Ru, Rh, Pd, Ag, Re, Os, Ir, Pt or Au as a guest material. (I) (In the formula, R1-R8 independently represent a hydrogen atom, an alkyl group, an aromatic group or the like; n represents 2 or 4; and Z represents an aromatic group, a triarylsilyl group or the like when n is 2, while representing Al(III) when n is 4).