Early school leaving in upper secondary education is a serious problem for both students and society. Several reviews have shown that there is no simple cause of early school leaving, but it seems to relate to demographic variables, social factors, academic achievement, and school factors. In this study, data from 2,045 students aged 16 from upper secondary schools in Norway were analyzed using a hierarchical regression model. Their intention to leave school was the dependent variable. Our analyses found that teacher support and loneliness in the school context were strong predictors of such intension. The effects of peer acceptance and friendship were minimal.