Intraosseous access must be practiced. With Louis Leg, there is finally a training leg for intraosseous access in the proximal tibia. The inexpensive trainer is securely attached to a table with suction cups, the puncture pads are replaceable and significantly reduce the cost of consumables. The pads are designed in such a way that the resistance is lifelike and the loss of resistance can be clearly felt. The trainer is lightweight and insensitive, making it ideal for courses and mobile training.