The experience of living with people who present a Severe Mental Disorder (SMD) is hard for the families, especially for children who have been less studied. This research was aimed to know how the experience of having lived with a parent with severe mental disorder influenced on childhood, adolescence and young adulthood of their children. Method: The experience of coexistence with a parent with SMD in 10 children (6 men and 4 women) aged between 18 and 29 years was analyzed through individual semi-structured interviews and a group interview. The sample was obtained by convenience and all participants lived at least two continuous years during their childhood with a parent who presented SMD. Regarding the diagnoses, four parents suffered schizophrenia and six, bipolar disorder. The study is qualitative, exploratory and of descriptive type. An analysis of content and thematic of the corpuses was performed. Results: Show that by coexisting with a parent with SMD have negative as well as positive consequences. Among the negative consequences the following can be mentioned: distressing feelings, family burden and the delay of stages in the vital cycle. On the other hand, the positive consequences are related to the development of strengths in the offspring. Conclusions: These findings may provide inputs to be focused on the work with children of people affected by SMD.