A new species of operculated land snail in the genus Pupina, is described from Cat Tien National Park, Dong Nai Province, Vietnam. Pupina cattienensis, new species, is the ninth species of the genus in Vietnam and differs from its congeners in having a more bulging last whorl, more whorls, parietal tooth completely covering the posterior canal, and an extension of the apertural lip next to the anterior canal. An updated distribution of Pupina species from Vietnam is also provided.