In this study, the energy levels of 159 Gd are measured within the framework of the photonuclear reaction. For this aim, bremsstrahlung photons of 18 MeV endpoint energy produced by a clinical linear accelerator are used. The gamma photons emitted from the unstable 159 Gd nucleus are counted by using a high purity Germanium detector. The energy levels are determined with gf3 and ROOT spectrum analysis programs. The experimental results have been compared with the NUDAT database