To provide a method of dividing the terminal of a multicore parallel line, which enables a worker to easily divide the terminal of a multicore parallel line without recourse to his mastery, and to keep the quality and enhance the work efficiency.

In this method of dividing the terminal of a multicore parallel line where a plurality of insulated cables with their conductor surfaces covered with insulating layers are arranged in parallel and the insulated cables are bonded and fixed together, a point of the multicore parallel line at which the worker desires to divide is sandwiched by a pair of heated heating plates and divided by rubbing the heating plates while adding a load to it. Consequently, it can be divided easily by breaking an adhesive layer with heat and rubbing the heating plates, thus the good quality of the terminal section can be kept and work efficiency can be enhanced.