Attitudes of ninth grade students and their classroom teachers toward using condoms as a preventive measure against contracting AIDS were studied. Students (N = 438) and their teachers (N = 28) in the council schools of the Municipality of Copenhagen were surveyed using a structured questionnaire. Overall, results demonstrated that the message regarding "safe sex" had been well understood. However, 42% of pupils reported not using a condom during their last sexual intercourse. Many pupils indicated difficulty in using condoms. A continuing need exists for advice to the young. An information campaign, with distribution of free condoms, was well accepted by pupils and teachers. Almost all (94%) pupils indicated they will use condoms more frequently in the future. This campaign differed from other efforts that focused more on general information. The importance of other strategies designed to alter behavior to reduce the risk of contracting AIDS is discussed.