This document describes the construction of a database of corporate bonds issued by firms in Argentina between 1989 and 2005. The database draws on two main sources, the Bolsa de Comercio de Buenos Aires and the Comisión Nacional de Valores, while some additional information comes from the Mercado Abierto Electrónico. In all, we collected information on 1356 corporate bonds, though there are some bonds that have fields with missing information. Our data basically covers the characteristics of the bonds at time of issue. That is, we do not have a detailed description of how the characteristics of those corporate bonds that defaulted in 2001/2002 and were subsequently renegotiated changed. Based on the data from the primary markets, we constructed a series with the total outstanding stock of corporate bonds over this period. The information in the database allows to calculate these stocks at the firm level.