The current account has held an importance for the Thai economy management in the sense that it reflects the international trade and investment situation. In the past, Thailand had a long experience of a deficit in the current account, which shakes the stability of Thai economy over decades. It was not until 1998, after the country was hard hit by the economic crisis causing a change in exchange rate regime in which it lead to a large depreciation in domestic currency, that Thailand for the first time has seen the surplus in this account. The objective of this study is to investigate factors that might be influence on the determination of current account of Thailand, by utilizing the data between 1972 to 1996. The study will disaggregately estimate the equations that determine the balances in international trade, service and revenues, and compare the forecasting capability of the model with that of received from the aggregated analysis.