A conducting hinge device adapted to be mounted on an electric toy gun, the electric toy gun including a first body-section, a second body-section that is pivotally connected to the first body-section, an electric motor unit that is mounted in the first body-section, and a battery unit that is mounted in the second body-section for providing electric energy to the electric toy gun, said conducting hinge device being characterised by: a conducting unit adapted to be installed between the first body-section and the second body-section, and including two pin members that are electrically conductive and that are spaced apart along an axis, each of said pin members being adapted to be electrically connected to the electric motor unit; and a hinge conductor unit including two hinge leaves that are adapted to be mounted co-movably to the second body-section and that are electrically conductive, each of said hinge leaves being sleeved on a respective one of said pin members and adapted to be electrically connected to the battery; wherein said two pin members of said conducting unit are adapted to be immovably connected to the first body-section; wherein each of said two hinge leaves of said hinge conductor unit is rotatably sleeved on the respective one of said pin members; wherein said conducting unit further includes two stationary wires, each being adapted to be electrically connected to a respective one of said pin members and the electric motor unit; wherein said hinge conductor unit further includes two connecting wires, each being adapted to be electrically connected to a respective one of said hinge leaves and the battery unit; and wherein each hinge leaf has a surrounding portion surrounding the respective one of said pin members, an abutting portion extending from one end of said surrounding portion and being adapted to abut against the second body-section, and a conducting portion extending from another end of said surrounding portion, each of said connecting wires being electrically connected to said conducting portion of the respective one of said hinge leaves. a conducting unit adapted to be installed between the first body-section and the second body-section, and including two pin members that are electrically conductive and that are spaced apart along an axis, each of said pin members being adapted to be electrically connected to the electric motor unit; and a hinge conductor unit including two hinge leaves that are adapted to be mounted co-movably to the second body-section and that are electrically conductive, each of said hinge leaves being sleeved on a respective one of said pin members and adapted to be electrically connected to the battery; wherein said two pin members of said conducting unit are adapted to be immovably connected to the first body-section; wherein each of said two hinge leaves of said hinge conductor unit is rotatably sleeved on the respective one of said pin members; wherein said conducting unit further includes two stationary wires, each being adapted to be electrically connected to a respective one of said pin members and the electric motor unit; wherein said hinge conductor unit further includes two connecting wires, each being adapted to be electrically connected to a respective one of said hinge leaves and the battery unit; and wherein each hinge leaf has a surrounding portion surrounding the respective one of said pin members, an abutting portion extending from one end of said surrounding portion and being adapted to abut against the second body-section, and a conducting portion extending from another end of said surrounding portion, each of said connecting wires being electrically connected to said conducting portion of the respective one of said hinge leaves. wherein said hinge conductor unit further includes two connecting wires, each being adapted to be electrically connected to a respective one of said hinge leaves and the battery unit; and wherein each hinge leaf has a surrounding portion surrounding the respective one of said pin members, an abutting portion extending from one end of said surrounding portion and being adapted to abut against the second body-section, and a conducting portion extending from another end of said surrounding portion, each of said connecting wires being electrically connected to said conducting portion of the respective one of said hinge leaves. a surrounding portion surrounding the respective one of said pin members, an abutting portion extending from one end of said surrounding portion and being adapted to abut against the second body-section, and a conducting portion extending from another end of said surrounding portion, each of said connecting wires being electrically connected to said conducting portion of the respective one of said hinge leaves.