The present study intended to produce biodiesel as an efficient fuel from waste Phoenix dactylifera L. kernel oil in the presence of synthesized efficient heterogeneous metallic oxide catalyst (Mn@MgO-ZrO2). The performance of synthesized metallic oxide catalyst was evaluated based on biodiesel yield and the process has been optimized. The optimum biodiesel yield was 96.4%, when process temperature was 90 °C, catalyst loading 3 wt%, methanol to oil ratio 15:1 and reaction dur