The cuspidariid bivahfe, Myonera inouei new species, is described from a Paleocene (upper Selandian) calcareous concretion probably derived from the Tomikawa Sandstone and Conglomerate Member in eastern Hokkaido, northern Japan. This is the oldest record of this genus. Myonera inouei possibly lived in upper bathyal depths. It provides another example of taxa of deep-sea origiii in the Paleocene. The senior author, Kazutaka Amano, is the single author of the new species.