A method and apparatus for winding and knotting a thread around a sewing thread of a button for clothes so that a gap between the button and a suit, on which the button is sewn, is maintained. The thread, which is twisted at least twice, passes over and winds around the sewing thread, thereby forming firm knots of the thread around the sewing thread and preventing the knots from being disentangled. Since guiding means accurately and reliably guides the thread to pass over the sewing thread, and the knot-guiding means and the thread take-up means of the apparatus are simultaneously operated by a single driving means, the invention performs firm and effective winding of the thread around the sewing thread and reduces production costs and energy consumption rate of the apparatus, and reduces failure rate, thereby improving reliability of winding and knotting the thread around the sewing thread.
