Background Emotion dysregulation has been shown to be a transdiagnostic characteristic of eating disorders. The Affect School aims to enhance emotional awareness and the ability to perceive and express emotions. This study was conducted as part of an RCT where patients with various eating disorders were randomised to participation in the Affect School as a supplement to treatment. Aim To explore Affect School participants’ and leaders’ experiences of the Affect school at an Eating Disorder outpatient unit in Sweden. Method Nine patients with eating disorder diagnoses and three Affect School leaders at an eating disorder outpatient clinic in Sweden were interviewed for their experiences of the intervention. The interviews were analysed with Thematic Analysis. Result Eight themes were revealed at the analysis, five from the participants: "Worries about group participation", "Not alone anymore and gaining new insights about oneself", "Shared stories can also be painful", "Relationships outside the Affect School as a foundation for affective work", and "A change is coming", and three from the leaders:"Affect awareness is important in eating disorders", "Group meetings create opportunities and challenges", and "The Affect School setup needs more customisation". Conclusion The results suggested that the Affect School provided an acceptance for experiencing all sorts of affects. Both leaders and participants considered working with affects necessary, although participants reported no changes in their life situation or condition after the intervention but considered the intervention as part of a process with gradual results. Being part of a group and sharing experiences was experienced as positive by participants and leaders, but the model could be further developed to better adapt to patients with an eating disorder. © 2022 Petersson,WÃ¥hlin. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.