We have succeeded in obtaining unique one-dimensional (1D) chain complexes (1, 2, and 3) comprised of two types of metal species: rhodium and platinum. These compounds are constructed from a dinuclear rhodium complex (i.e., [Rh-2]) and a pivalamidate-bridged platinum complex (i.e., [Pt-2]), forming an attractive quasi-1D infinite chain, expressed as {[Rh-2] [Pt-2] [Pt-2]}. Interestingly, the bridging ligands of [Rh-2] can be varied with trifluoroacetate, acetate, and acetamidate groups, indicating the possibility of electronic structure modulation in the ID chain.