Abstract: Disclosed is a protective cap (400) for an imaging device, the cap having a hollow protective cap body with a front end (404), a cylindrical surface (402) and an open rear end (406), through which the imaging device can be inserted into the protective cap, and a depression (408) provided in the front end. The protective cap also has at least one channel (502) provided at the front part of the protective cap body, beneath the front end, the at least one channel having a first opening that is provided in the lateral wall (412) of the depression and a second opening that is provided preferably in the cylindrical surface of the protective cap body.