The Murchison carbonaceous chondrite was analyzed for polynuclear aromatic thiophenes in organic solvent extract. Benzothiophene, dibenzothiophene and their methyl derivatives, and benzonaphtothiophenes were detected in concentration at levels of ten and hundred-pmol g(-1). The abundance pattern of these thiophenes in the chondrite was markedly different from those in the two kinds of terrestrial sediments, indicating abiotic origin of these thiophenes.