The aim of this article is to investigate whether there is a long-run relationship (cointegration) between exports and imports for 22 least developed countries (LDCs). This is an important issue, for evidence of cointegration will ensure that trade imbalances are sustainable. The article explores this issue using the bounds testing approach to cointegration. The results indicate that exports and imports are cointegrated only for six out of the 22 countries, and the coefficient on exports is less than one.