During the retorting process of oil shales in Fischer retorts sulphur is transferred to retorting products (to oil, gas or semicoke) in different proportions, depending on the content of organic sulphur (more precisely on the share of organic sulphur in total one) in the shales. The conditions of retorting the shales do not influence the sulphur content in the retort oils. High-sulphur oils obtained in the experimental retort are similar to each other in their chemical group composition. They are characterized by an increased content of aromatic hydrocarbons and a reduced content of phenols and alkenes.