The results of studies of studies on transportation of ion of nickel(II) trough multicomponent liquid membranes as a kind of tetrarodanide anion complex NH₄[Ni(SCN)₄] are cited. At contact of water solution of this complex with liquid membrane consisting of crown ether – 6-methyl-dibenzo-18-crown-6 (I), of aliphatic oil C₃₃ and C₂H₄Cl₂ is transported in a kind of anion complex (L^.NH₄)₂[Ni(SCN)₄]. The influence of concentration of crown ether on kinetics of transport of ion of nickel(II) via multicomponent liquid membranes.