A novel one-dimensional polymeric Cu(I) halide complex with iodine bridges between copper atoms and 2-phenylquinoline as an N-donor ligand is prepared. The complex is characterized by elemental analyses, IR spectroscopy, and crystallographic studies.The coordination geometry around copper may be described as distorted trigonal planar. The I—Cu—I, Cu—I—Cu, and N—Cu—I angles are 115.90(2), 116.37(2), and 124.80(8)°, respectively. The Cu—I distances range from 2.563(6) to 2.569(6) Å, and the Cu—N bond is 2.016(2) Å, being in good agreement with that in the related structures.