A heat shield for thermography of the human plantar skin was designed, fabricated and tested. The main purpose of the heat shield is to provide, during the acquisition of the thermogram, an homogeneous temperature background behind the patient’s feet. The heat shield is a water tank made of copper sheet, which is filled up with water of about 4°C, and it is painted in matte black. By using this heat shield, the thermography of the human feet can be achieved for about 120 minutes, without changing the water in the tank.