This paper examines what contributes to the trade growth of intermediate machinery goods in East Asia in the 1990s. To this end, this paper regresses the input allocation equation to obtain the estimator of border barriers in each country, and then, by using the estimators, the first difference logarithmic form of the gravity equation is regressed. Our empirical results suggest that reduction in border barriers and the production and expenditure growth of intermediate goods are important factors which contribute to the rapid growth of trade in machinery parts in East Asia. This paper examines what contributes to the trade growth of intermediate machinery goods in East Asia in the 1990s. To this end, this paper regresses the input allocation equation to obtain the estimator of border barriers in each country, and then, by using the estimators, the first difference logarithmic form of the gravity equation is regressed. Our empirical results suggest that reduction in border barriers and the production and expenditure growth of intermediate goods are important factors which contribute to the rapid growth of trade in machinery parts in East Asia.