{[(phenyl-formamido)-carbon-yl]amino}-methane-thio-amide), C9H9N3O2S, both benzoyl and terminal thio-urea fragments adopt transoid conformations with respect to the central carbonyl O atom. The benzoyl and thio-biuret groups are almost coplanar, making a dihedral angle of 4.40 (8)°. The mol-ecular structure is stabilized by two intra-molecular N-H⋯O hydrogen bonds. In the crystal, N-H⋯O and N-H⋯S hydrogen bonds link the mol-ecules into a tape running along [101].