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Glomus tumors are rarely developed in the lung. We report a case of a pulmonary glomus tumor that was observed for a long period. The patient was a 50-year-old man. Chest computed tomography showed a 6 mm nodule in the left lower lobe. The patient requested follow-up observation. The nodule gradually increased and was resected 6 years later. Pulmonary partial resection was performed thoracoscopy. The lesion was diagnosed as a glomus tumor with no malignant features. Pulmonary glomus tumors are rare and difficult to diagnose before resection. However, care is necessary as they may be malignant.