Conjugated polymer, insolubilized polymer, organic electroluminescence element material, composition for organic electroluminescence element, polymer production process, organic electroluminescence element, organic EL display and organic EL lighting

A conjugated polymer comprising a repeating unit represented by formula (I′), wherein

• said conjugated polymer has, as a substituent, a group comprising a group represented by formula (II), and has a weight average molecular weight (Mw) of 20,000 or more and a dispersity, Mw/Mn, where Mn indicates a number average molecular weight, of 2.40 or less:
• wherein:
• n represents an integer of 0 to 3;
• each of Ar21 and Ar22 independently represents a direct bond, an aromatic hydrocarbon group which may have a substituent, or an aromatic heterocyclic group which may have a substituent;
• and
• each of Ar23 to Ar25 independently represents an aromatic hydrocarbon group which may have a substituent, or an aromatic heterocyclic group which may have a substituent,
• provided that both Ar21 and Ar22 do not represent a direct bond, and
• said conjugated polymer has, as a substituent, a group comprising at least one group represented by formula (II) in one molecule:
• wherein the benzocyclobutene ring may have at least one substituent, and substituents may combine with each other to form a ring.

A conjugated polymer comprising:

• at least one repeating unit selected from the group consisting of repeating unit family (A),
• and
• at least one repeating unit selected from the group consisting of repeating unit family (B),
• wherein said conjugated polymer has a weight average molecular weight (Mw) of 20,000 or more and a dispersity, Mw/Mn, where Mn indicates a number average molecular weight, of 2.40 or less.