Eosinophilic pneumonia (EP) is a rare, heterogeneous group of respiratory diseases, characterized by eosinophilic pulmonary infiltrates, with or without peripheral blood eosinophilia. The hallmark of chronic eosinophilic pneumonia (CEP) is a massive accumulation of eosinophils in the lungs, and an increased number of eosinophils in the bronchoalveolar lavage (BAL) fluid. We present the case of a 58 years-old female patient who came to the Clinical Hospital of Pneumology "Leon Daniello" from Cluj Napoca, Romania, with the suspicion of a recurrent diffuse interstitial pneumonia, despite of a proper antibiotic and symptomatic treatment. After clinical and paraclinical investigations the patient was diagnosed with idiopathic chronic eosinophilic pneumonia. Corticosteroid treatment was started, with rapid improvement in both clinical and radiographic abnormalities.