Alveolar adenoma is an extremely rare benign tumour of the lung. Less than 30 cases have been reported in the English literature. A 42-year-old asymptomatic female who presented with a solitary peripheral pulmonary nodule on chest roentgenogram underwent thoracoscopic wedge resection and was diagnosed with this rare tumour. The indolent clinical progression and the absence of recurrence and metastasis after complete resection are the most important characteristics of this tumour. The classical solitary pulmonary nodule is a common and vexing problem. Nodules are extremely common in clinical practice and challenging to manage. Solitary pulmonary nodules can represent different specific lung diseases, focal non-specific inflammations, and primary and secondary malignant tumours. Identification of malignant nodules is important because they represent a potentially curable form of lung cancer.