Polymer and organic electroluminescent device including the same

A polymer compound comprising a repeating unit shown by the following formula (1) wherein at least one of Ar1, Ar2 and Ar3 is a group shown by the formula (2):

• in the formula (1), Ar1, Ar2 and Ar3, which may be the same or different, are a group shown by the formula (2), a substituted or an unsubstituted aromatic hydrocarbon group having 6 to 60 ring carbon atoms or a substituted or unsubstituted aromatic heterocyclic group having 5 to 60 ring atoms;
• in the formula (2), L1 is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 60 ring carbon atoms, a substituted or unsubstituted fluorene group or a substituted or unsubstituted aromatic heterocyclic group having 5 to 60 ring atoms;
• X is a substituted or unsubstituted hetero atom;
• R1 and R2, which may be the same or different, are a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 5 to 50 ring atoms, a substituted or unsubstituted alkoxycarhonyl group having 2 to 50 carbon atoms, an amino group substituted by a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a halogen atom, a cyano group, a nitro group, a hydroxyl group or a carboxyl group;
• when the formula (1) has two or more groups shown by the formula (2), the groups shown by the formula (2) may be the same or different;
• a is an integer of 0 to 3 and h is an integer of 0 to 4;
• and
• the two bonds shown in the formula (1) are, present on a group other than the group shown in the formula (2).