The condition known as hydropneumothorax occurs when fluid and air are both present in the pleural space. A bronchopleural fistula, an infection, a spontaneous pneumothorax, trauma, or rarely diffuse lung disease are a few conditions that might cause a hydropneumothorax. The most common radiographic finding in hydropneumothorax is an intrapleural air-fluid level. When hydropneumothorax is the major diagnosis, thoracentesis and chest radiographs offer a conclusive diagnosis. The current case report details an unusual cause of left-sided hydropneumothorax for a 78-year-old man who had a hydropneumothorax during his hospital stay, as well as how the problem was addressed with positive outcomes and patient satisfaction. Keywords: Hydropneumothorax, Pneumothorax, Hemothorax