Climate change, deforestation, and urbanization are contributing to a significant increase in the risk of wildfires, which are particularly critical in areas close to urban centers, where the potential damage to people and infrastructure is unacceptable. The use of aircraft in aerial firefighting is a well-established practice, involving both adapted aeronautical platforms and purpose-built aircraft. Among these, scoopers stand out for their ability to rapidly refill water from natural or artificial reservoirs. The box wing represents a disruptive innovation in the aeronautical field, capable of providing greater efficiency and load capacity thanks to its multiplane configuration. This work presents the conceptual design of a firefighting aircraft of the scooper category equipped with a box wing.