Objective: Adult ADHD is associated with impaired quality of life (QoL) and deficient executive function (EF). Given the absence of studies examining the relationship between EF and health-related quality of life (HRQL) in this population, the purpose of the present study was to do so, by the use of rating scales and tests. Method: Adults with ADHD (n = 81) completed ADHD and EF questionnaires and a neuropsychological battery. Results: Small to large significant correlations were found between EF ratings and HRQL for most of the variables. No significant correlations were found between all but one EF test and HRQL. Both ADHD symptoms and EF rating, but not the EF test, were found to have a unique contribution to the HRQL. Conclusion: These results strengthen the ecological validity of the EF rating scales and their utility in identifying EF deficits with real-world implications for adults with ADHD. (J. of Att. Dis. XXXX; XX(X) XX-XX)