The growth in energy demand is a challenge for managers of large cities such as Buenos Aires. Meet this demand in a sustainable manner is the goal demanded by society for this new century. The shallow geothermal energy is a renewable energy that is considered as an alternative to existing energy sources thanks to its advantages. However, it is a great unknown. To overcome this initial barrier and make it known, the available geothermal potential of the Matanza-Riachuelo Basin, where the City of Buenos Aires is located, were calculated. For the estimation of shallow geothermal potential, it is necessary to reproduce the behavior of the underground environment under exploitation of this resource. The heat transport equation in porous media was implemented. The input parameters necessary for this estimate were obtained from the existing geological model for the Matanza-Riachuelo Basin and the hydrogeological numerical model available. These parameters are mainly the groundwater velocity, the thickness of each hydrogeological formations and geothermal ground parameters (volumetric heat capacity and thermal conductivity). As a result of this initial estimate, maps of shallow geothermal potential were obtained for the entire Matanza-Riachuelo Basin. These maps reflect the feasibility of the exploitation of this resource in the City of Buenos Aires, thanks to the high geothermal potential values calculated, up to 10 kW.