FOREIGN-MATERIAL-REMOVING DEVICE, GROUND EQUIPMENT FOR CONTACTLESS ELECTRICITY-SUPPLYING SYSTEM, AND CONTACTLESS ELECTRICITY-SUPPLYING SYSTEM

A foreign-matter-removing device (30) for a coil device includes a liquid-jetting unit (31, 32, 33, 34) that washes away a foreign matter (100), which is present in an area through which a magnetic field generated in wireless supply of power using magnetic coupling of a receiving-side pad (11) and a transmitting-side pad (21) passes, by ajet of liquid (101).