The purpose of this study is to estimate the coronal and cross sectional appearance of the branching patterns of the pulmonary artery in the left lingula using pulmonary tomography and computed tomography (CT). Eight specimens were analyzed; five were interlobar type (arising from pars interbobaris) and three were mixed type. The mediastinal type (arising from pars mediastinalis) was not seen. In 75% (segmental), and 50% (subsegmental), the branching patterns were estimated radiologically. With radiological findings, the arteries of mediastinal type run to the upper or mediastinal side of the bronchus and the arteries of the interlober type run outside or out-lowerside of the bronchus. It is difficult to estimate the branching patterns of the pulmonary artery in the left lingula because of the oblique projection of the arteries.