The present invention relates to a bookbinding machine capable of binding using twin springs, such as a calendar, a notebook, and the like, comprising: a spring supply gear installed on an upper portion of a drive device body to supply the twin springs to the bookbinding machine; A guide wheel installed on the front cover member of the binding machine body to guide the twin springs wound on the winding roller according to the rotation of the spring supply gear; and guide the twin springs installed on the cover member and introduced by the guide wheel to the spring supply gear. A support plate having a guide rail and a guide groove; A guide bar and a hole guide roller member for guiding the twin spring supplied by the spring supply gear to be fitted into the binding hole of the bookbinding object; A spring supply device including a cutter that constantly cuts the twin springs to a length corresponding to a length corresponding to a length in which the twin springs are inserted into a plurality of binding holes formed in a bookbinding object is configured. In the case of binding paper with twin springs, the present invention relates to a spring supply device of an automated one-system bookbinding machine that allows the twin springs to be smoothly inserted into the lower binding hole of the supplied inlay and cover paper, and at the same time improve productivity and product quality.
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