Abstract Six years ago, a 60‐year‐old man presented to our hospital with a cough and sputum. Upon suspicion of nontuberculous mycobacterial (NTM) infection, he was followed up at our hospital. Because the abnormal shadows in the bilateral lung fields deteriorated slightly over 6 years, bronchoscopy was performed. Exophiala dermatitidis and Mycobacterium intracellulare were detected in the bronchial lavage fluid. The patient underwent follow‐up examinations without drug administration. Currently, the patient's condition remains stable. E. dermatitidis is regulatory found in the lungs of patients with cystic fibrosis, but only rarely is it found in respiratory samples from patients without cystic fibrosis. However, NTM complications have been reported more frequently in recent years. Due to the increasing number of NTM patients, E. dermatitidis pulmonary infections may also increase. Additional research is required to develop strategies for treating this infection.
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