Two Field experiments were carried out on sandy soil at El-Sheikh Zwaied Research Station of Desert Research Center, North Sinai during 2009 and 2010 growing seasons. The aim of this study was to investigate the effect of bentonite at rates of 4, 5 and 6 ton/fed. , zeolite at rates of 1, 2 and 3 ton/fed. and control treatment added solely or in combination on growth, yield and its components, as well as chemical composition of potato plants. Results revealed that soil application of bentonite and zeolite wheather added solely or in combination enhanced plant growth, improved tuber yield and its components as well as chemical composition, except Na and Cl. Also, increasing the rate of bentonite and zeolite induced gradually improvement of growth and yield characters. In addition, the highest growth parameters, yield and its components, as well as chemical constituents were, generally, obtained with application 4 ton bentonite combined with 3 ton zeolite per fed. followed by 5 ton bentonite combined with 2 ton zeolite per fed. While, sodium and chloride content decreased with increasing rate of bentonite and zeolite; the highest contents were observed with control treatments.