A card adapter 1 is provided which may connect/disconnect a card-shaped electronic device and has a chassis 10, a push member 40 disposed in the chassis 10 for pushing a CF card 2, an eject lever 50 movably mounted with respect to the chassis 10, a link arm 60 pivotably mounted on the chassis 10 via a rotation axis 13, and the like. In the card adapter 1, one end of the link arm 60 is linked with the push member 40 via a first linking part 14, and the other end of the link arm 60 is linked with the eject lever 50 via a second linking part, whereby the movement of the eject lever 50 is transmitted to the push member 40 via the link arm 60. According to such a structure, the card adapter 1 can reliably and easily connect and disconnect the CF card 2.