Wireless power feeding device

A wireless power feeding device comprising:

• an attachment member having a socket to be electrically connected to a power supply and a fastener to be electrically connected to a ground;
• and
• a band having a socket pin to be inserted to the socket and a locking tool to be locked to the fastener, the band being removably attached to the attachment member by inserting the socket pin and locking the locking tool and fixing a power receiving device to which power is to be wirelessly fed to the attachment member, wherein
• the socket pin has
• a power feeding electrode to be electrically connected to the power supply within the socket;
• and
• a ground connection sensing electrode to be electrically connected to the ground via the locking tool and the fastener, and
• the attachment member has
• a switch circuit that electrically connects the power supply to the power feeding electrode and energizes a power feeding unit that wirelessly feeds power to the power receiving device only when the ground connection sensing electrode of the socket pin inserted to the socket is electrically connected to the ground.