This book summarizes years of teaching of surface phenomena and heterogeneous catalysis to students of the first phase of the Chemical process engineering and petrochemistry at the University of El-Oued, southeastern of Algeria, according to the program of the Algerian Ministry of Higher Education and Scientific Research. In this manuscript, four chapters: Surface tension, Adsorption, Hysteresis phenomenon and Generalities about catalysis and catalysts (methods of synthesis and characterization), finally a Serie of exercises.