Five representative samples of ceramic clays from three deposits in the Donje Crniljevo area (Western Serbia) have been studied by XRD and chemical analysis. These clays have similar mineral composition, characterized by the presence of kaolinite, illite, smectite and interstratified illite-smectite. Ceramic clays were formed after erosion and transportation of clastic material from the weathering crust into the sedimentary environment.