Implementing cognitive-behavioral therapy (CBT), the first-line psychological treatment for panic disorder (PD), may be challenging in patients with comorbid coronary artery disease (CAD).This study aimed at assessing the feasibility and acceptability of a CBT for PD protocol that was adapted to patients suffering from comorbid CAD. It also aimed at evaluating the efficacy of the intervention to reduce PD symptomatology and psychological distress and improve quality of life. This was a single-case experimental design with pre-treatment, post-treatment and 6-month follow-up measures. Patients with PD and stable CAD received 14 to 17 individual, 1-h sessions of an adapted CBT for PD protocol. They completed interviews and questionnaires at pre-treatment, post-treatment and at a 6-month follow-up assessing intervention acceptability, PD symptomatology, psychological distress and quality of life. A total of 6 patients out of 7 completed the intervention and 6-month follow-up, indicating satisfactory feasibility. Acceptability was high (medians of ≥ 8.5 out of 9 and ≥ 80%) both at pre and post treatment. Remission rate was of 83% at post-treatment and 6-month follow-up. The intervention appeared to have positive effects on comorbid anxiety and depression symptoms and quality of life. The intervention appeared feasible and acceptable in patients with comorbid CAD. The effects of the adapted CBT protocol on PD symptoms, psychological distress and quality of life are promising and were maintained at the 6-month follow-up. Further studies should aim at replicating the present results in randomized-controlled trials