Parents' perspective on their responsibilities with regard to adolescents' use of alcohol Background: Parents have responsibilities when their adolescent offspring use alcohol, but little is known about their views on the topic. This knowledge would help healthcare organisations to develop practices to help parents meet their responsibilities. Aim: The aim of this study was to describe parents' perceptions and experiences of their responsibilities and what support they needed to tackle underage drinking. Design and methods: This Finnish study was carried out in 2017. It used a qualitative descriptive method that involved carrying out semi-structured interviews with 20 parents of adolescents aged 14-15 years. The data were analysed using inductive content analysis. Results: Parents described that it was their responsibility to prevent problems that could have a negative impact on their adolescents' well-being. When it came to their responsibilities with regard to adolescents using alcohol, parents saw these as guiding and protecting their child, being aware of how parents used alcohol themselves, the way they communicated with adolescents and the rules they set about experimenting with alcohol. Parents said that receiving collaborative support from peers, community and professionals working in health and social care services would be useful. This could help them to prevent adolescents using alcohol, tackle problems that occurred when adolescents drank and enable parents to play a responsible role in their local community. Conclusion: Parents recognised that they had responsibilities to prevent alcohol having a negative impact on adolescents' well-being. They wanted to ensure that adolescents made sensible and responsible decisions when it came to using alcohol. Parents described that the most important form of support was peer support from other parents. The findings of this study can be used to inform the development of preventive healthcare services and support parents to meet their responsibilities with regard to tackling underage drinking.