In the mononuclear title complex, [CuI(C(4)H(9)N(3)S)(C(18)H(15)P)(2)], the Cu(I) ion displays a distorted tetra-hedral coordination geometry involving two P atoms of two triphenyl-phosphane mol-ecules, one S atom of a 1-(propan-2-yl-idene)thio-semicarbazide mol-ecule and one iodide ion. In the crystal, C-H⋯π inter-actions [C-H⋯centroid distances = 3.443 (3) and 3.788 (3) Å] and N-H⋯S hydrogen bonds form layers parallel to (100). An intra-molecular N-H⋯I hydrogen bond is also observed.