The experiment was carried out at the experimental fields of the Field Crops Department, Faculty of Agriculture, Ege University during the growth period of 2003 and 2004. Split-plots experiment design with three replications were used. The main plots were clinoptilolite applications (with 6 t ha(-1) and without treatment) and the subplots were rice varieties. Average yield of the varieties was approximately 11 % higher in the first plots with clinoptilolite application than untreated plots (the second plots without clinoptilolite). It was observed that clinoptilolite affected yield components positively. It decreased sterility (9.3 %) on the other hand, increased protein content (9.7 %) and macro-micro mineral in grain.