https://www.selleckchem.com/products/e7449.html Emotional disorders (anxiety and depressive disorders) are a relevant public health concern associated with high prevalence, high costs, and important disability. Therefore, research priorities include designing and testing cost-effective interventions to reach everyone in need. Internet-delivered interventions for emotional disorders are effective and can help to disseminate and implement evidence-based treatments. However, although these treatments are generally effective, not all patients benefit from this treatment format equally. Blended treatments are a new form of intervention that combines the strengths of face-to-face and Internet approaches. Nevertheless, research on blended interventions has focused primarily on individual therapy, and less attention has been paid to the potential of using this format in group psychotherapy. This study aims to analyze the feasibility of blended transdiagnostic group CBT for emotional disorders. The current article describes the study protocol for this trial. A pproval from the Ethics Committee of Universitat Jaume I (September 2019) and will be conducted in accordance with the study protocol, the Declaration of Helsinki, and good clinical practice. The results of this study will be disseminated by presentation at conferences and will be submitted for publication in a peer-reviewed journal. ClinicalTrials.gov Identifier NCT04008576. Registered 05 July 2019, https//clinicaltrials.gov/ct2/show/NCT04008576. ClinicalTrials.gov Identifier NCT04008576. Registered 05 July 2019, https//clinicaltrials.gov/ct2/show/NCT04008576. Although relationship distress is strongly associated with mental health problems, poorer social functioning and lower quality of life, only a minority of distressed couples engage in effective couples therapy. Common barriers are the financial burden, fear of being stigmatized, long waitlists and logistical concerns, such as the difficulty in scheduling appoint