The title compound, C16H16N2S2, adopts a gauche (+)-gauche (+)-gauche (+) (g(+)g(+)g(+) ) conformation in the NH-CH2-CH2-NH bond sequence. In the crystal, mol-ecules are connected by pairs of N-H⋯S=C hydrogen bonds and C-H⋯π inter-actions, forming a tape structure along the c-axis direction.