The health hazards of tobacco consumption are well known; numerous prevention programs exist, but knowledge of risk factors for starting to smoke is scarce. This study addressed the question if school-related factors influence smoking behavior in 7-17-year-old pupils. A cross-sectional study including 2459 pupils of schools in Rhineland-Palatinate, Germany, was conducted. Roughly every twentieth child (n = 135, 4.5%) had smoked at least once. In the multivariate model the probability of smoking was associated with older age, being male, not being content, and having inadequate family support, as well as with feeling unfairly treated at school. These findings suggest the imposition of gender- and age-adequate prevention with a focus on social support from school and parents to decrease the number of juvenile smokers.