Abstract: The flexible projectile arresting device is used typically in the playing or practicing of a ball game such as baseball, golf or soccer to restrict the flight of the ball to a limited area. The elements of the device include side and roof panels of flexible material, such as netting, loosely suspended by cord or rope between rigid compression struts or poles at corners. The struts are inclined so as to be located behind the panels out of the path of the ball or projectile. The tops of the struts are restrained by tension guys secured at the ground. The device moves upon impact by the projectile thereby absorbing and dissipating kinetic energy and preventing dangerous rebound. The device returns to its original shape after impact.