The lingular pulmonary artery is known for being frequently subjected to bifurcation anomalies, thus asserting the importance of performing three-dimensional computed tomography angiography before lung surgery for safety reasons. We report a case of branching anomaly of the left ventrobasal and laterobasal arteries, which instead of branching from the interlobar artery, branched as a common trunk from the mediastinal lingular artery. A 68-year-old man with diagnosis of rectal cancer lung metastasis in the ventral segment of left upper lobe (S3) presented branching anomaly of the pulmonary artery, which was detected by a preoperative three-dimensional computed tomography angiography. Although there was a conversion from segmentectomy to left upper lobectomy to secure the margin with the tumor, the operation was safely performed and completed by video-assisted thoracic surgery, since the vascular branching anomalies were characterized preoperatively.