The invention discloses a conductive attached material comprising a first attached part, a second attached part, and a first buffer part. The first attached part is extended along a first direction. The second attached part is extended along a second direction. The buffer part is connected with the first attached part and the second attached part, and is protruded from the part between the first attached part and the second attached part after being bent, and then the second direction is different from the first direction. The invention also discloses a panel device and an attaching method of a conductive attached material. The panel device comprises an outer frame, a panel disposed on the outer frame, and the above mentioned conductive attached material. The conductive method of the conductive attached material is characterized in that the first attached part can be attached to the edge of the panel, the bent buffer part, and then the second attached part can be attached to the outer frame.