This article examines the real exchange rate behavior during pre-crisis post-crisis periods in selected East Asian countries by verifying its long-run stability with unit root tests and investigating the interactions among the component variables of the real exchange rate i.e. the exchange rate the relative prices with a vector autoregressive (VAR) model. The main findings of the study are as follows. First the results of the unit root tests indicate a non-stationarity of the real exchange rate of each sample country during the pre-crisis period. Second, the test results show the stationarity of the real exchange rates in all the sample countries during the combined crisis post-crisis periods although during the post-crisis period alone they do not always remain stationary. Third the results of the VAR model analyses reveal that most of the cases during the combined crisis post-crisis period covering all sample countries support the Granger causality from the relative prices to the exchange rate describe a significant continuous effect of the relative prices on the exchange rate. JEL Classification: E44, F33