To provide a conductive polymer composition which is excellent in conductivity, transparency, and mechanical properties, can be easily and smoothly subjected to melt molding, and can prevent global warming due to environmental pollution and generation of carbon dioxide, and to provide a molded body obtained from the composition.

There is provided a polylactic acid composition comprising polylactic acid (A) and a -electron conjugated polymer (B). Alternatively, there is provided a polylactic acid composition comprising polylactic acid (A), a -electron conjugated polymer (B), and a block copolymer (C), wherein the absolute value of the difference of the solubility parameter of at least one polymer block in a plurality of polymer blocks which constitute the block copolymer (C) and the solubility parameter of the -electron conjugated polymer (B) is less than 2.5. There is also provided a molded body made from these polylactic acid compositions.