Objective: To (i) explore the factors influencing family out-of-home (OH) eating events and (ii) identify possible opportunities for food businesses to support families in making healthier OH choices. Design: Focus group discussions were conducted with parents (six to eight participants per group) and friendship pair discussions (informal interviews with two children who are friends) were conducted with children (5-12 years) throughout the island of Ireland. Both discussions were audio-recorded and analysed using a thematic content analysis. Setting: Eight focus groups and sixteen friendship pairs were conducted in Northern Ireland and sixteen focus groups and thirty-two friendship pairs were conducted in the Republic of Ireland. Subjects: Purposive sampling was used to recruit a sample of non-related parents and children that represented equal numbers of gender, age, socio-economic status and demographic backgrounds. Results:: The main, overarching theme was that families perceived OH eating to be a treat, while health was not currently a key priority for many parents and children. Children were reported to have most responsibility for their own food choice decisions in this environment, with taste and food neophobia having the greatest influences. Parents believed that if food businesses could meet parent and child priorities in addition to health influences, e.g. change cooking methods, and increase flexibility, then families would be more likely to patronise these establishments. Conclusions: The entire family OH eating experience needs to be considered when developing public health interventions and this research has highlighted key opportunities that caterers could employ to support healthier family OH food choices. Obesity is a complex, multifaceted public health problem in which the food environment plays a key role (1) . Out-ofhome (OH) eating is one aspect of the food environment that is becoming increasingly important in promoting overeating and excess energy intakes. The increasing trend in OH eating has been well documented in the USA (2,3) , but a lack of consistent data and definition of OH eating has hindered the identification of any clear trends for the UK and Republic of Ireland (ROI). In the UK, OH eating accounted for 11 % of total energy intakes in 2011 (4) but the definition of OH eating was not clear, with the exception of including school and work meals. In ROI, OH eating contributed 24 % to total energy intakes when restaurants, takeaways, shops and delicatessens were included (5) .In adults, OH eating has been associated with larger portion sizes (2,6,7) and higher energy intakes (2,(6)(7)(8)(9) but lower micronutrient (8) and fruit and vegetable intakes (6,9,10) . Similar findings have been found for children, suggesting that children who eat OH frequently have higher intakes of total energy, total fat, total carbohydrate, added sugars and sugar-sweetened beverages with lower intakes of fibre, milk, fruit and vegetables (11,12) . Fast-food establishments and restaurants were f...