BackgroundIntergenerational programmes are formal activities bringing different generations together and have been identified as a way to help people living with dementia to stay socially connected. While there is some evidence from individual studies as to their benefits, there is no overall coherent account as to the perceptions and experiences of participants who engage in such programmes. This review synthesises qualitative evidence of the experiences and perceptions of young people and older people living with dementia of participating in such programmes.MethodsWe searched EBSCO CINAHL, OVID Medline, Embase, Ovid PsycINFO, the Web of Science, Epistemonikos and grey literature sources. We used thematic synthesis to analyse and synthesise the evidence in to four themes, with 11 key findings. We assessed our confidence in each of these findings using the GRADE-CERQual (Confidence in the Evidence from Reviews of Qualitative research) approach.FindingsOur review highlights the potential enjoyment for young people and older people living with dementia when participating in Intergenerational programmes, despite some initial trepidation. These programmes provide an opportunity to establish and develop relationships and for young people to learn about dementia, ageing and how to interact with older people living with dementia. However, it is important to have staff facilitators present to provide reassurance to both groups. It is also important to take the personal preferences of participants into account and to be considerate of noise levels and other aspects of programme delivery that may inhibit engagement.ConclusionThis is the first qualitative evidence synthesis specifically exploring Intergenerational programmes aimed at older people living with dementia. We provide insights into the perspectives of those who have participated in Intergenerational programmes. It is important to consider these views, together with other evidence of effectiveness, when planning Intergenerational programmes. While our review is limited by a small number of studies from only a few countries, we have moderate to high confidence in our findings. Further research into the development of Intergenerational programmes specifically tailored for people living with dementia is needed. The findings also provide guidance for people planning to deliver or design future Intergenerational programmes.