This paper studies the impact of officiall development association (ODA) on Vietnam's economic growth, with research data from 1992 - 2020 through the use of error correction model (ECM - Error Correction Model) to determine the extent of the trend long - term and short - term effects with the use of tests for stationarity (Unit Root Test), cointegration (Cointegration Test) and Granger Causality Test. Research results show that in the long term, ODA has had a positive impact on growth, through additional capital for domestic savings and foreign currency capital for imports. However, the research results also show that ODA has over-substituted and replaced domestic savings in the long run, thereby hindering the motivation to invest with domestic capital and making the economy dependent on domestic capital. foreign capital sources.