Organic electroluminescent element material, organic electroluminescent element composition, organic electroluminescent element, display device, and lighting device

A polymer comprising a repeating unit represented by the following general formula (1) and a cross-linkable group:

• [Ka 1]
• (wherein
• Ar11 to Ar13 each independently represents a divalent aromatic group which may have a substituent,
• Ar14 and Ar15 each independently represents an aromatic group which may have a substituent,
• Ar16 and Ar17 each independently represents a direct bond or a divalent aromatic group which may have a substituent,
• R11 and R12 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an aromatic group which may have a substituent,
• r represents an integer of from 0 to 5, and
• R11 and R12 may be connected to each other to form a ring structure,
• in which the repeating unit represented by the above-described general formula (1) may contain the cross-linking group.).