Pulmonary parenchymal injury occurring after blunt thoracic trauma varies from simple contusion to laceration. Posttraumatic pulmonary pseudocyst is a rare complication of blunt thoracic trauma. It is a benign lesion which does not have its own epithelial component, and is mostly seen in children and young adults. Resorption undergoes an average of three months, but it could be transformed rarely into an abscess or cyst formation. Computed tomography is important in diagnosing pseudocysts. The majority of traumatic pulmonary pseudocysts are benign self- limiting lesions which do not require specific treatment. Indications for surgery are limited and can only be applied when complications develop. We aimed to report a case of pulmonary pseudocyst, which is a rare finding of blunt chest trauma due to a fall from a height, in the light of the literature.