In the last years, the insertion of nano-clays into hydrogels is an efficient approach to produce nanocomposite hydrogels. The introduction of hydrophilic nano-clay into hydrogels causes an increase in water absorbency producing nanocomposite hydrogels with different clay concentration. In the present work, nanocomposite hydrogels based on Poly(N-2-vinylpirrolydone) (PVP)/ Poly(vinylalcohol)(PVAl) were synthesized using laponite RD. Ionizing process from gamma radiation (25 kGy) was used as network crosslinker. Swelling behavior of nanocomposite hydrogels was analyzed as a function of clay concentration. The structure of nanocomposite hydrogels was investigated by Scanning Electron Microscopy (SEM) and Thermogravimetric Analysis (TGA) techniques. The swollen nanocomposite hydrogels were used to study water retention capacity (WRC).