Samples of two older geochemical reference rocks GSJ JG-1 (granodiorite) and JB-1 (basalt) and three new ones GSJ JA-1 (andesite), JR-1 (rhyolite) and JB-2 (basalt) were subjected to determination of lanthanoid elements by radiochemical neutron activation analysis. The contents of 9 lanthanoid elements could be re-determined for the older reference rocks and those of 11 elements were determined for the new rocks. The results were compared with the previously published data.