Fair trading and market access are needed for sustainable development, and export competitiveness is one of the implementations of this goal. Indonesia has three leading export commodities in the world market, namely mineral fuels, animal/vegetable fats and oils, iron and steel. This study aims to determine the sustainability of Indonesia’s competitive position in four ASEAN countries (Malaysia, the Philippines, Thailand, and Singapore), based on Revealed Comparative Advantage (RCA), and to examine the factors that influence it. The results of this study indicate that Indonesia’s three leading commodities had sustainable competitiveness in the ASEAN market. Indonesia’s mineral fuel commodities have strong competitiveness based on RCA values > 1, an and animal /vegetable fats & oils have strong competitiveness except with Thailand in 2004-2011. Meanwhile, iron & steel commodities, which were initially weakly competitive, then had strong competitiveness along with increasing demand. The factors that determine export competitiveness have different responses for each commodity, where economic distance affects the competitiveness of all commodities, the exchange rate has a strong influence on mineral fuel commodities and animal or vegetable fats & oils, and the local currency affects the competitiveness of iron and steel exports.