Alloying of metals forming linear chains in the one-dimensional metal complexes was performed by use of vacuum evaporation technique. Mixture of two different metal complexes with dimethylglyoxime could be fabricated into a thin film with optical quality. They showed a strong d-p transition band in the visible region, and their peak wavelengths subsequently varied in proportion to the mixing ratio of metal complexes. Their third-order nonlinear optical property was also investigated by third-harmonic generation measurements.