The writer has studied the chromites in the Tari district, Tottori Prefecture and some facts relating to the minerals. The reports are included chiefly in the Nihon Ganseki Kobutsu Kosho Gakkai Shi (The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists) and the Shimane Daigaku Ronshu (Bulletln of the Shimane University (Natural Science)). The author describes chiefly the origin of chromites in the present paper.