With high solubility workability is excellent, suitable novel polymer as a conductive material, and provides a novel compound which is a raw material.
Novel compounds which are the raw materials, the following formula (I)
[Formula 1]

However, formula (I) in: A is S, B is at ^R 2 ^{(R 2} is an alkylene group having carbon atoms of 2-3 that may have a substituent), and A and B by intramolecular cyclization, a thiophene derivative to form a bicyclic heterocyclic ring together with the thiophene group, the novel polymers thereof thiophene derivative are polymerized is suitable as a conductive material.