ABSTRACT. Vietnamese universities and research institutes of the Ministry of Fisheries maintain collections of molluscs for research, educational, and public information purposes. The deposited material has considerable historic value because the voucher specimens have been referred to in publications since 1937. However, at the moment many of the specimens have uncertain status. Thanks to funding by DANIDA/ENRECA, and the considerable effort of Vietnamese institutions, which have produced individual catalogues of species, the Tropical Marine Mollusc Programme (TMMP) presents voucher material available in those collections and make updated information internationally known for the first time. Judgements of the approximately 2200 names given to species deposited in Vietnam, and/or described in the literature, are due to the concerted efforts of resource persons of the TMMP. Classification by authors, obvious misidentification, and records of species not found in Vietnam are listed. However, we emphasize that in the majority of cases we have only judged the names given to species; not the actual specimens. Invariably this approach is associated with some qualified guessing, but taxa identified by TMMP resource persons during activities in Vietnam are specified in the list, which has an index to all taxa. The annotated inventory includes a bibliography of mollusc publications located in the library of the Institute of Oceanography, Nha Trang, in addition to remarks on published taxa, photographs of selected species, and a compilation of non-marine species in an annex.