1-Benzyl-idene-4-ethyl-thio-semicarbazide.

The title compound, C(10)H(13)N(3)S, was prepared by the reaction of 4-ethyl-thio-semicarbazide and benzaldehyde. The dihedral angle between the benzene ring and the thio-urea unit is 8.96 (7)° and an intra-molecular N-H⋯N hydrogen bond generates an S(5) ring.