Polymer compound and light emitting device using the same

A polymer compound comprising a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (X) and/or a constitutional unit represented by the following formula (Y), wherein the content of the hydroxyl groups contained in the polymer compound is less than 0.02 mol%: [wherein, Ar 1 represents an arylene group and this group optionally has a substituent.] [wherein, a X1 and a X2 each independently represent an integer of 0 or more. Ar X1 and Ar X3 each independently represent an arylene group or a divalent heterocyclic group and these groups each optionally have a substituent. Ar X2 and Ar X4 each independently represent an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly to each other, and these groups each optionally have a substituent. When there are a plurality of Ar X2 and a plurality of Ar X4 , each of them may be the same or different. R X1 , R X2 and R X3 each independently represent an alkyl group, an aryl group or a monovalent heterocyclic group and these groups each optionally have a substituent. When there are a plurality of R X2 and a plurality of R X3 , each of them may be the same or different.] [wherein, Ar Y1 represents an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly to each other, and these groups each optionally have a substituent.].