The tert-butyl and p-chlorophenylthio groups occupy cis positions with respect to the oxazolidinone ring. The ring adopts a shallow envelope conformation with the N atom displaced 0.160 (9) angstrom from the least-squares plane through the other atoms of the ring. The degree of pyramidalization at the N atom is small (the angles at the N atom sum to 353.6-degrees).