This study involved 608 children and adolescents between 7 and 18 years of age (M-age = 12.9, SDage = 2.70) from 47 residential care centres in Peru (RCC). The objective of the study was to observe the mediating effect of school satisfaction on the relationship between violence by teachers at school and the subjective well-being of children and adolescents, considering how the low or high support from residential care staff can condition this mediating effect as well. The descriptive results show a very high prevalence of violence inflicted by teachers at school for both children and adolescents in residential care in Peru. Regarding the results obtained from the moderated mediation model results, the school satisfaction domain is observed to have a mediating effect on the relationship between teacher violence and subjective well-being in children and adolescents. In addition, a moderated mediation effect conditioned by support from residential care staff is seen only in the case of children.