The exports value of Iran's base metal industry ranked second among manufacturing industries after the petrochemical industry. Considering this stylized fact, the aim of the paper is to measure the competitiveness of Iran's base metal industry using the data over the period 2002-2005. This study uses Relative Export Advantage (RXA), Relative Trade Advantage (RTA), Constant Market Share (CMS) and Trade Map (TM) indices to measure competitiveness of this industry.The results of this study indicate that in spite of the existence of comparative advantage at major exportable products of Iran's base metals, there is no clear and stable trend of the competitive advantage in the products. Furthermore, the growth rate of relative export advantage of the products is fluctuating over the period 2002-2005. The same results have obtained based on trade map index. More specifically, there is no product which maintains competitive position throughout the whole period of this study. Finally, based on the constant market share which indicates the competitive performance of major export products in target markets, the competitive effect has generally no stability in the target markets, and it is frequently observed to have periodical variations in its values. These results are probably due to lack of sufficient attention to the factors of competitive advantage such as quality, efficiency and innovation, higher domestic consumption, higher production factor price. Based on the findings of the study, it is not sufficient to rely only on comparative advantages, but it is highly recommended that the attention should also be paid to competitive advantages.