The main objective of this research was to determine the relationship between Aggression (A) and School Coexistence (CE). The research was conducted with a quantitative approach, basic type, correlational level, non-experimental design, cross-sectional and hypothetical deductive method. Non-probabilistic convenience sampling was applied considering a sample made up of 60 6th grade students from educational institution No. 20595 "José Gabriel Condorcanqui", elementary level, from the San Mateo district. The validity of the expert judgment and the confirmation of reliability were met, through Cronbach's Alpha (aggressiveness = -0.613 and school coexistence = -0.711). The survey technique was used and through two instruments (questionnaires) the data were collected via Google forms. The results obtained were (P = 0.000, Rho = -0.407), it is concluded that there is a significant negative and moderate inverse correlation between the study variables.