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In this paper an analytical procedure for the determination of La, Ce, Pr and Nd in rare-earth ores is described. More than 5000 of powdered samples were prepared from the ores selected in various places of their deposit. The samples were analyzed by energy-dispersive X-ray fluorescence (EDXRF) with an Am-241 source for the radiation excitation of characteristic K-lines of the elements mentioned. The results were compared with the data of other methods and reference materials. The correlation of La-Ce, La-Pr, La-Nd, Ce-Pr, Ce-Nd and Pr-Nd elements pairs were determined.