Novel inorganic-organic complex nanocomposites have been prepared by using exfoliated Fe (x) Ti1-2x Nb1+x O-5(-) nanosheets and poly (N-octadecyl-2-ethynyl pyridinium bromide) (PNOEtPyBr) by the method of exfoliation-reflocculation. The X-ray diffraction data of the nanocomposites indicate the formation of Fe (x) Ti1-2x Nb1+x O-5/PNOEtPyBr nanostructure with the length of basal spacing of 4.6 nm along the stacking direction of Fe (x) Ti1-2x Nb1+x O-5(-) nanosheet layers. The a. c. electrical conductivity of nanocomposites decreased with the value of x. This trend was correlated with the hydration behavior of the interlayer for HFe (x) Ti1-2x Nb1+x O-5 center dot nH(2)O (x = 0-0.5) which were starting compounds of nanosheets.