This work presents the analysis of magnetometric data of an aerial survey conducted in the Rio do Peixe Sedimentary Basin, which is a promising oil producing region in the state of Paraíba, Brazil. The collected aeromagnetometric data allowed the preparation of maps regarding magnetic anomaly, horizontal and vertical derivatives, analytical signal and Euler Deconvolution that were compared with the geology, topography, and regional seismic. Thus, we identified the main lineaments of the basin that were Tatajuba, Portalegre, and Malta faults. Furthermore, we also found a maximum basin depth of almost 1400 m, which is compatible with the available seismic survey.