The paper examines the association between restrictions on teacher tobacco smoking at school and student exposure to teachers who smoke during school hours. The data are taken from a European Commission-funded study "Control of Adolescent Smoking" (the CAS study) in seven European countries. Multilevel modelling analyses were applied to investigate associations between national legislation concerning tobacco smoking in school, local school smoking restrictions and students' exposure to teachers who smoke at school. The analyses integrate data from three levels: national (types of policy and how restrictive they are), school (survey among teachers, n = 455) and student (survey among 15-year-old students, n = 10 890). The results suggest that both national- and school-level policies on restriction of smoking among teachers are associated with a decreased probability of students reporting that they are exposed to teachers who smoke indoors, but an increased probability of being exposed to teachers smoking outdoors. (Contains 5 tables.)