An organic EL element comprising: a positive electrode, a negative electrode, and an organic thin film layer disposed between the positive electrode and the negative electrode; wherein the Organic thin film layer comprises an organometallic complex, wherein the organometallic complex comprises: a rhenium (Re) atom, one ligand which comprises a coordinated nitrogen atom and a coordinated oxygen atom, each coordinated with the rhenium (Re) atom, and comprises at least one π conjugation part, and the other ligand coordinated with the rhenium (Re) atom in such a way that the ligand saturates the coordination number of the rhenium (Re) atom and the charge of the whole organometallic complex is neutral; and wherein the organometallic complex is represented by a formula which is selected from the following formulas, and: in which, in the formulas, and, R 1 to R 4 may be the same or different, and each represent a hydrogen atom or a substituent group; "i", "j", "k" and "l" are integers; Cγ 1 represents one ring structure containing a coordinated nitrogen atom which is coordinated with a rhenium (Re) atom, and two carbon atoms which are bonded to the nitrogen atom and are shared with Cγ 2; Cγ 2 represents the other ring structure which is bonded to the oxygen atom bonded to a rhenium (Re) atom and contains the two carbon atoms shared with Cγ 1; Cy 3 represents one ring structure containing a coordinated nitrogen atom which is coordinated with a rhenium (Re) atom, and a carbon atom which is bonded to the nitrogen atom and to a carbon atom in Cγ 4; Cγ 4 represents the other ring structure containing a carbon atom which is bonded to the oxygen atom bonded to a rhenium (Re) atom and a carbon atom which is bonded to a carbon atom in Cγ 3; the letter "L" represents the other ligand which saturates the coordination number of the rhenium (Re) atom, and neutralizes the charge of the whole complex; "m" represents 1 or 2; and "n" represents 1,2 or 3. a positive electrode, a negative electrode, and an organic thin film layer disposed between the positive electrode and the negative electrode; wherein the Organic thin film layer comprises an organometallic complex, wherein the organometallic complex comprises: a rhenium (Re) atom, one ligand which comprises a coordinated nitrogen atom and a coordinated oxygen atom, each coordinated with the rhenium (Re) atom, and comprises at least one π conjugation part, and the other ligand coordinated with the rhenium (Re) atom in such a way that the ligand saturates the coordination number of the rhenium (Re) atom and the charge of the whole organometallic complex is neutral; and wherein the organometallic complex is represented by a formula which is selected from the following formulas, and: in which, in the formulas, and, R 1 to R 4 may be the same or different, and each represent a hydrogen atom or a substituent group; "i", "j", "k" and "l" are integers; Cγ 1 represents one ring structure containing a coordinated nitrogen atom which is coordinated with a rhenium (Re) atom, and two carbon atoms which are bonded to the nitrogen atom and are shared with Cγ 2; Cγ 2 represents the other ring structure which is bonded to the oxygen atom bonded to a rhenium (Re) atom and contains the two carbon atoms shared with Cγ 1; Cy 3 represents one ring structure containing a coordinated nitrogen atom which is coordinated with a rhenium (Re) atom, and a carbon atom which is bonded to the nitrogen atom and to a carbon atom in Cγ 4; Cγ 4 represents the other ring structure containing a carbon atom which is bonded to the oxygen atom bonded to a rhenium (Re) atom and a carbon atom which is bonded to a carbon atom in Cγ 3; the letter "L" represents the other ligand which saturates the coordination number of the rhenium (Re) atom, and neutralizes the charge of the whole complex; "m" represents 1 or 2; and "n" represents 1,2 or 3. a rhenium (Re) atom, one ligand which comprises a coordinated nitrogen atom and a coordinated oxygen atom, each coordinated with the rhenium (Re) atom, and comprises at least one π conjugation part, and the other ligand coordinated with the rhenium (Re) atom in such a way that the ligand saturates the coordination number of the rhenium (Re) atom and the charge of the whole organometallic complex is neutral; and wherein the organometallic complex is represented by a formula which is selected from the following formulas, and: