In the title compound, [Cu(C(12)H(15)N(4)S(2))(C(18)H(15)P)], the copper(I) center is tetrahedrally coordinated by one S atom and two N atoms from one bis(3,5-dimethylpyrazol-1-yl)dithioacetate ligand and one P atom from a triphenylphosphine ligand. In the crystal structure, adjacent pyrazole rings are involved in weak pi-pi interactions, thereby forming a one-dimensional zigzag chain running along the b axis.