The main goal of the research was to check whether the dimensions of the quality of family interactions are statistically significant predictors of adolescents’ self-efficacy and school success. The sample was convenient and consisted of 187 adult adolescents (102 boys and 85 girls). The Quality of Family Interactions Scale and Self-efficacy Questionnaire for Children were used.The results of the multiple regression analysis indicate that the quality of family interactions is a significant predictor of adolescents’ social self-efficacy, explaining 46% of the variance of this criterion variable (R2 = .46; F(5, 181) = 30.33; p ˂ .001), with the dimension of paternal acceptance showing statistical significance with a positive direction of the β coefficient (β = .48; p ˂ .001). The model in which dimensions of family interactions are predictors of emotional self- efficacy is statistically significant and explains 40% of the variance of this criterion variable (R2 = .40; F(5, 181) = 23.70; p ˂ .001). Significant predictive power is shown by the dimensions of paternal acceptance (β=.45; p=.00) and maternal acceptance (β = .28; p ˂ .05), both dimensions with a positive direction of the β coefficient. In relation to academic self-efficacy, the model made up of dimensions of family interactions is statistically significant and explains 51% of the variance of this variable (R2 = .51; F(5, 181) = 37.47; p ˂ .001), with the dimension of maternal acceptance being the only significant predictor with positive direction of the β coefficient (β = 42; p ˂ .001). When it comes to predicting school success, the family interaction dimensions model is statistically significant (R2 = .25; F(5, 181) = 12.09; p ˂ .001). Predictive potential is shown by the dimensions of paternal acceptance (β = .43; p ˂ .001) and maternal acceptance (β = .44; p ˂ .001), both dimensions with a positive direction of the β coefficient. The dimension of paternal rejection proved to be a significant predictor, but with a negative direction of the β coefficient (β = -.43; p ˂ .001). The main conclusion of the research is that the experience of parental acceptance significantly contributes to adolescents’ self-efficacy and school achievements. Keywords: family relationships, self-efficacy, school success, adolescence