We report a case of acute eosinophilic pneumonia (AEP). Although the patient had been a habitual cigarette smoker for over 4 months, he had had not any respiratory distress. After he inhaled smoke from fireworks for 3 consecutive nights, the patient began to complain of cough, fever and dyspnea. He showed leukocytosis of 16,200/microl and hypoxemia of 58.1 torr. Chest radiograph showed bilateral infiltrates with Kerley A and B lines. The bronchoalveolar lavage fluid revealed 38.5% eosinophils. He was diagnosed as AEP. In this patient, inhaling of smoke from fireworks was clinically suspected to be associated with the induction of AEP.