Disclosed herein is a card adapter which can reliably isolate a slot provided in a personal computer and a card-shaped electronic device from a user. The card adapter 1 includes a chassis 10, a pair of conducting plates 70, 71 provided on the upper and lower sides of the chassis 10, and the like. The chassis 10 includes a pair of arms 17L, 17R, and the tip portions of the arms 17L, 17R are provided with a pair of insulating grip portions 18L, 18R, respectively, for insulating the pair of conducting plates 70, 71 from a user. According to such a structure, the card adapter 1 can prevent the possibility that static electricity charged in the body of a user is discharged to the slot or to the card-shaped electronic device connected to the card adapter 1 through conductive parts such as the conducting plates 70, 71 and the like so that electronic circuits provided in the card-shaped electronic device or in the slot are broken or damaged.