In Tanzania, teachers in primary schools conduct oral health education as part of the school syllabus, most of them without any training for the task. The participation, willingness and abilities of teachers involved in this duty were studied by means of questionnaire, interviews, oral hygiene examinations and practical exercises. The teachers' knowledge of oral health matters and their skills in toothbrushing were poor. Health lessons in general were not accorded high priority. The teachers preferred parents to instruct their children on toothbrushing, and were reluctant to teach pupils about dietary matters. They stressed the shortage of time and materials for teaching health lessons and their heavy workload at school. These findings indicate a necessity, and a point of departure, for organising training for oral health education and encouraging teachers to undertake this task.