The invention relates to a conductive assembly structure of a wire connecting device, which plays a role of increasing the conductive efficiency and the stability of a combined wire. The conductive assembly comprises a plate-shaped body and a restriction body connected to the body, and the restriction body is provided with a first base portion, a first arm and a second arm which are connected to the base portion and a free segment connected to the first arm and the second arm, thereby enabling the restriction body to have an elastic clamping function together. When a wire is inserted into and contacted with the conductive assembly, the tail end of the wire is enabled to at least be pressed between the first arm and the second arm of the restriction body to form fixation, thereby improving the situation that the conductive efficiency and safety of the wire are affected by deflection or shaking and unstable contact due to an external force.