Ecopetrol announces benchmark transaction of debt securities

Ecopetrol, S.A announced today a benchmark offer of U.S. dollar denominated debt securities in the international markets. This offering is part of the Company´s 2009 financing plan, and proceeds will be used to fund the company´s investment plan.

The notes have not been registered under the Securities Act of 1933 and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.

Bogotá, Colombia, July 10 of 2009

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Ecopetrol is Colombia´s largest integrated oil company and is among the top 40 oil companies in the world and the four largest oil companies in Latin America. Besides Colombia, where it accounts for 60% of total production, the Company is involved in exploration and production activities in Brazil, Peru and the United States (Gulf of Mexico). Ecopetrol has the principal refinery in Colombia, most of the network of oil and multiple purpose pipelines in the country, and it is considerably increasing its participation in biofuels.

This release contains forward-looking statements relating to the prospects of the business, estimates for operating and financial results, and those related to growth prospects of Ecopetrol. These are merely projections and, as such, are based exclusively on the expectations of management concerning the future of the business and its continued access to capital to fund the Company´s business plan. Such forward-looking statements depend, substantially, on changes in market conditions, government regulations, competitive pressures, the performance of the Colombian economy and the industry, among other factors; therefore, they are subject to change without prior notice.

Contact us for any additional information:

Investor Relations
Alejandro Giraldo

Phone: +571-234-5190
Email: investors@ecopetrol.com.co

Media Relations (Colombia)
Mauricio Téllez
Phone: + 571-2345377
Fax: +571-2344480
Email: mtellez@ecopetrol.com.co

Website: www.ecopetrol.com.co