A cable anchoring device includes: a vibration isolation member including a damper; a socket; and a cap. A rib is formed in at least one of the socket and the cap is inserted into a portion of the damper. The vibration isolation member is inserted into a hole formed in the cap. The socket is coupled to the cap. In a state where the rib has been inserted into the portion of the damper, a void is formed in the portion of the damper.