PURPOSE: To enable easy manufacture of a conductive polymer material with uniform film thickness and without generation of separation and crack by supporting a conductive sheet-shaped base material with connected conductive supporters to perform polymerization.

CONSTITUTION: A conductive sheet-shaped base material 1, on an insulating support 3, is conveyed to an electrolytic polymerization bath 5, and polymerization of conductive polymer is performed in a polymerization position 6 of the lower part of an opposite electrode 2. That is, the conductive sheet-shaped base material 1 is supported to be conveyed between two connected conductive supporters 4. Therefore, even a short conductive sheet-shaped base material 1 can be conveyed, a desired shape can be obtained without necessity to truncate the manufactured conductive polymer material, and a highly reliable conductive polymer material without separation and crack of the conductive polymer material can be obtained.