﻿AbstractSpecies of the potter wasp genusAllorhynchiumvan der Vecht (Eumeninae:Odynerini) occurring in Vietnam are presented. Seven species have been recorded from Vietnam. Of them, three species are described as new to science:AllorhynchiumlatumNguyen, Tran & MT Nguyen,sp. nov.,A.moerumNguyen & AD Nguyen,sp. nov., andA.setosumNguyen & Engel,sp. nov., and one species,A.argentatum(Fabricius, 1804), is recorded from Vietnam for the first time. An updated key to the Oriental species of the genus is presented.