The electronic structure of the binary ErNi2 intermetallic compound is investigated by means of valence band resonant photoemission spectroscopy at the Er 4d-4f and Ni 2p-3d thresholds. Resonant photoemission spectra obtained using synchrotron radiation in energy ranges corresponding to the region of studied levels maximum absorption are recorded. It was found that the Er valence electrons are highly localized and the appearance of resonance is due to the contribution of the excited state elastic decay. Also, it was found that the Ni 2p electron passes into extended states, which indicates the prevalence of the excited state inelastic decay in the process of photoemission enhancement. The probability of relaxation of the excited electron to the core level decreases, which leads to the occurrence of the Auger process observed in the spectra.