Organic electroluminescent device

An organic electroluminescent device comprising an organic compound layer provided between a pair of electrodes, which comprises a polymer represented by the formula

• wherein Uem represents a unit comprising a metal complex represented by the following Formula (3-C):
• wherein RC1 and RC2 each independently represent an alkyl group or an aryl group;
• RC3, RC4, RC5, and RC6 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, a halogen atom, or a cyano group;
• each of nC3 and nC6 represents an integer of 0 to 3;
• each of nC4 and nC5 represents an integer of 0 to 4;
• when there are plural RC3s, RC4s, RC5s, or RC6s, the plural RC3s, RC4s, RC5s, or RC6s may be the same as each other or different from each other,
• the metal complex being linked to the polymer via RC1;
• wherein Up represents a unit comprising a hole transporting moiety having the following structure:
• wherein the asterisk * represents a site at which the hole transporting moiety bonds to the polymer;
• and
• each of m and n represents a mole percentage that satisfies the equation of m+n=100 mol %, with the mole percent ratio of m:n being in the range of from 5:95 to 20:80.