A polymer compound having an excellent crosslinking ability is provided. The polymer compound has at least one terminal constitutional unit represented by the formula (1) and a constitutional unit represented by the formula (2): In the constitutional unit represented by formula (1), mT represents an integer of 0 to 5, nT represents an integer of 1 to 4, cT represents an integer of 0 to 1, QT represents a crosslinkable group, KT represents an alkylene group or the like and ArT represents an aromatic hydrocarbon group or the like. In the constitutional unit represented by formula (2), mA represents an integer of 0 to 5, n represents an integer of 1 to 4, Ar1 represents an aromatic hydrocarbon group or the like, KA represents an alkylene group or the like and Q1 represents a crosslinkable group.