Two types of cytoplasmic inclusions were observed in leaf and root tissues of host plants infected with the common and yellow bean mosaic viruses: (1) filamentous inclusions considered as an aggregate of virus particles and (2) lamellar inclusions which appeared with varied configurations that represent sections at different angles of the same cylindrical structure. No type of inclusion or virus particle was seen in pollen and ovule from bean plants infected with each of the two viruses. Since, however, the common bean mosaic virus is transmitted through the pollen it is suggested that it occurs in very low concentration in this structure or else as viral nucleic acid.