NOVELTY - A thermoelectric conversion material comprises carbon nanotubes and conjugated polymer. The conjugated polymer comprises condensed polycyclic structure having three or more hydrocarbon rings and/or condensed heterocyclic ring, as repeating unit (a), and monocyclic aromatic hydrocarbon ring structure, monocyclic aromatic heterocyclic structure or condensed ring structure of monocyclic aromatic hydrocarbon ring structure and monocyclic aromatic heterocyclic structure, as repeating unit (b).    USE - Material is used for thermoelectric conversion element for thermoelectric power generation article (all claimed) e.g. Peltier device. Uses include but are not limited to hot spring heat generator, solar power generation machine, waste heat generator, and power supply for wristwatches, semiconductor drive and small sensor.    ADVANTAGE - The thermoelectric conversion material has excellent thermoelectric conversion characteristics, dispersibility of carbon nanotubes, applicability and film formability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) thermoelectric conversion element (1), which has thermoelectric conversion layer (14) containing the thermoelectric conversion material; and    (2) carbon nanotube dispersoid, which contains carbon nanotubes which is dispersed in a solvent, and conjugated polymer having condensed polycyclic structure having hydrocarbon ring and/or three or more condensed heterocyclic rings, and carbon nanotube dispersoid including monocyclic aromatic-hydrocarbon ring structure, monocyclic aromatic heterocyclic structure or condensed-ring structure of monocyclic aromatic-hydrocarbon ring structure, monocyclic aromatic heterocyclic structure, as repeating unit.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the thermoelectric conversion element.    Thermoelectric conversion element (1)    Metal Plate (11,17)    Substrate (12,16)    Electrodes (13,15)    Thermoelectric conversion layer (14)