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The title compound, C 11 H 20 N 2 O 2 S, is an enanti­omerically pure heterocycle-substituted thio­urea synthesized under solvent-free conditions. The thio­urea unit adopts a  ZZ  conformation, with the HN—(C=S)—NH core almost planar and the tetra­hydro­furfuryl groups placed below and above this plane. The whole mol­ecule thus approximates to noncrystallographic  C2  symmetry. Unexpectedly, the C=S group is not involved in inter­molecular hydrogen bonding, as generally observed in homodisubstituted thioureas. Instead, mol­ecules form a one-dimensional network based on weak N—H⋯O(heterocycle) hydrogen bonding, resulting in a zigzag ribbon-like structure around the crystallographic 2 1  screw axis along [100].

(+)-(S,S)-1,3-Bis[(tetrahydrofuran-2-yl)methyl]thiourea