We present the results for two-loop MSSM corrections to the relation between
pole and running masses of heavy quarks up to the order O(as^2). The running
masses are defined in the DR scheme, usually used in multiloop calculations in
supersymmetric theories. The analysis of the value of these corrections in
different regions of the parameter space is provided.Comment: 25 pages, 10 figures, LaTeX2e file; minor changes, files mb.res,
mt.res replaced by new one