The catalytic behavior of perovskite-like oxides LaBO₃ (B = Cu, Fe, Co, Ni, Mn) prepared by Pecini method were examined in wet peroxide oxidation of phenol as a model organic substrate. The study showed the activity of only LaCuO₃ and LaFeO₃ perovskite-like catalysts, Cu-containing catalysts being more active, though Fe-containing being more stable. The leaching test proved heterogeneous nature of the catalyst action. Long-term experiments revealed the acceptable stability of the LaFeO₃ catalyst. XRD studies of the spent samples demonstrated stability of the perovskite-like structure of the catalysts during the reaction. The assumption about the nature of the active sites and the possible mechanism of the reaction was proposed based on of the XPS study.