Accessible summary This study asked fathers of adults who have a learning disability about their experiences, what helps them and any worries they may have. Fathers reported different experiences of being a father to an adult with a learning disability and talked about things that were helpful, such as their wives, grandparents, having information and hobbies. Fathers were worried about the person who has a learning disability in the future. Fathers can be important in supporting people who have a learning disability throughout their lives. Abstract Background There is little research that specifically relates to fathers of adults with a learning disability despite the social expectation that fathers will provide a supportive role over the lifespan. Methods Semi‐structured interviews were carried out with seven fathers of adults with a learning disability to explore their roles, needs and concerns. Data were analysed using a framework associated with interpretative phenomenological analysis (IPA). Results Themes arising demonstrate that fathers were shocked at the diagnosis of learning disability but usually reported adaptation over time. The impact of learning disability upon men's lives, their perception of their adult child and the roles they assumed were varied. Fathers valued support from wives and grandparents, having knowledge and interests and work‐type roles. All fathers were concerned about the future yet comprehensive futures planning was lacking. Some fathers reported difficulties in being emotionally open, and referred to societal stereotypes. Fathers valued positive support from service providers; however, this relationship was often in conflict. Conclusion Although mothers are often the main carers for adults with a learning disability, fathers can make a significant contribution. The findings presented here support the results of previous studies regarding paternal response to learning disability and varied impact upon men's lives. Identified support strategies include leisure interests, volunteer/work roles, having information and support from wives and grandparents. Ongoing concerns incorporate the future and ambivalent relationships with service providers, which could have a negative impact upon the individual who has a learning disability.