New types of triple-decker complexes with an organo-substituted P middle-deck were synthesized by the reaction of [Cp*Fe(η-PR)] (1a: R = CHSiMe; 1b: R = NMe) with halogeno-bridged transition metal dimers [Cp'''MX] (M = Cr, Fe, Co, Ni; X = Cl, Br). By oxidation of [(Cp*Fe)(Cp'''Co)(μ,η-PCHSiMe)] 2a with [CpFe][PF], the cationic complex [(Cp*Fe)(Cp'''Co)(μ,η-PCHSiMe)] was isolated. The electronic structure of the synthesized complexes was elucidated by DFT calculations.