The inductive endoscope preheater is to warm up endoscopes to body temperature prior to using the endoscope. This way, fogging is avoided. The preheating unit is equipped with an autoclavable glass insert. features fast and sterile warming, directly and contactless suitable for all common endoscopes and diameters low energy consumption at short heating periods optimal hygiene by touchless procedure and autoclavable glass inserts made of laboratory-grade glass easy and save handling