This paper examines the impact of trade liberalization on sectoral exportrnperformance of Sub-Saharan Africa countries using export supply functionrnbetween the periods 1980 to 2006. The underlying base of the study is therntheoretical justification that trade liberalization will lead countries to specializernand export commodities of their comparative advantage. A static panel datarnanalysis based on fixed effect and random effect model was adopted. The mainrnfindings are while trade liberalization has a significant positive impact onrnmanufactured export performance; its impact on primary commodity exportrnperformance is not worth mentioning. Production capacity of countries in SSArnis important factor for the export performance of countries both at aggregaternand disaggregate levels. The other explanatory variables are more important inrnexplaining the manufactured export performance.