A capsule endoscope includes a capsule enclosure having an external wall surface an image pickup device provided inside the capsule enclosure a light source provided inside the capsule enclosure a plurality of electrode structures each including an electrode, a water repellent layer, and a dielectric layer positioned between the electrode and the water repellent layer, the plurality of electrode structures being provided on the external wall surface of the capsule enclosure such that the electrode is positioned on an external wall surface side of the capsule enclosure a power supply provided inside the capsule enclosure at least one reference electrode provided on the external wall surface of the capsule enclosure and connected to reference potential of the power supply and a drive circuit configured to apply a drive voltage to the plurality of electrode structures based on the power supply.
