Contact allergy to cardiac implantable electronic devices is a rare problem in patients. Clinical evaluation and patch tests have an important place in its diagnosis. Also in this case, the diagnosis is supported by ultrasonography. It has been reported in the literature that allergic dermatitis developed after permanent pacemaker implantation in the first few days until the current year. In our case report, we showed that the allergic reaction in the patient was too late. In this article, we present a 94-year-old male patient with a permanent pacemaker who came to us with the complaint of redness and itching in the left chest area and was diagnosed with contact allergy.