We present two rare cases of unusual manifestations of Taenia solium infestation. Taenia infestation usually causes abdominal pain and diarrhea in humans. But there have been no clinical reports of ascites, chronic diarrhea, and malabsorption due to Taenia solium without evidence of the ova or larvae of the parasites in stool examinations. Our first unusual case was in a 30-year-old woman with spontaneous pneumothorax, pleural effusion, and ascites; the second case was in a 67-year-old man with a 3-year history of diarrhea, weight loss, and indigestion. Both patients showed blood eosinophilia and positive serologic tests for Taenia solium. After antiparasitic agent administration, their symptoms resolved successfully.