Human infection with the lung fluke Paragonimus westermani has become rare in Korea. Human paragonimiasis is caused by eating raw fresh-water crayfishes or crabs infected with larval metacercariae. Recently, we experienced three cases of pulmonary paragonimiasis in a family. They ate raw fresh-water crayfishes that lived in a stream in Wolchulmountain. All the parients had hypereosinophilia and pulmonary infiltrates with pleural effusion or hydropneumothorax, which did not improve on antibiotics. Ingestion of raw crayfishes was a clue for paragonimiasis. Positive results were shown both on intradermal skin test and ELISA for Paragonimus westermani specific IgG. After treatment with praziquantel, the patients showed an improvement. This is the first familial human paragonimiasis, reported from Wolchulmountain in Chonnam Province where there had been no previous cases of paragonimiasis.