Disclosed is a heating cooker suitable for cooking fish, meat, or the like, and preventing smell or smoke from being released when the cooking chamber is opened. The disclosed heating cooker comprises an enclosed cooking chamber having at least one heating element contained in the enclosed cooking chamber and a ventilation chamber having an inlet passage and an outlet passage. The cooking chamber is connected to the cooking chamber via the inlet and outlet passages allowing air to circulate between the ventilation chamber and the cooking chamber. A fan and a spraying unit may be disposed in the ventilation chamber wherein the fan is operable to circulate air between the cooking chamber and the ventilation chamber, and the spraying unit is operable to spray water from a reservoir adjacent to the ventilation chamber to intercept smell or smoke contained in air in the ventilation chamber.