We have previously reported on aclacinomycins A and B1) and will report on their nineteen analogues2) produced by a strain No. MA144-M1, which was classified as Streptornyces galrlaeus. In a continuing search for other new anthracycline antibiotics, we have found rhodirubins in the culture broths of a strain designated as ME505- HE1 belonging to Streptonn•ces sp. In this communication, the isolation of rhodirubins and their properties are reported.