Inflammatory myofibroblastic tumour (IMT) is a rare scleroinflammatory lesion, characterized by a myofibroblastic proliferation with inflammatory infiltrates, with many possible locations and diagnosis based on immunohistochemistry. Pleural IMT is uncommon and is usually an extension of a pulmonary involvement. We report on a 28-year-old woman with a new form of this rare entity, characterized by exclusive pleural involvement.