Adolescents with ADHD do not only struggle with teenage problems but they also have cognitive impairments which can affect the performance of daily activities. The aim of this study was to describe occupational therapists experiences of cognitive assistive technology as intervention for adolescents with ADHD between ages 13-18 years. As method a qualitative study with semi- structured interviews were conducted with ten occupational therapists working in northern Sweden. A qualitative content analysis was used to analyze, code and categorize collected data. The result of the analysis showed that the motivation and engagement of the adolescents, together with the support and teamwork within the surrounding network, were important and central aspects for interventions with cognitive assistive technology to be successful. The occupational therapist needed to create a picture of the adolescents situation and develop a cooperation to be able to with small changes reach a functioning everyday life. Through the use of cognitive assistive technology together with strategies and routines the adolescent was able to reach an increased independence and participation in daily activities. Conclusions that could be made from the result showed that occupational therapy work with adolescents with ADHD is complex and affected by multiple components. Cognitive assistive technology alone does not solve the everyday-challenges these adolescents meet as there is also need for learning of new strategies and routines.