The present invention relates to a binder for bookbinding, comprising: a clip portion 10 provided with a connecting rod 16 connecting the upper and lower supports 12 and 14 and the upper and lower supports 12 and 14 arranged to be opposed to each other; It is installed on the inner surface of the upper support 12, is installed on the inner surface of the band portion 20 and the lower support 14 in which the ratchet 22 is formed, and the insertion hole 32 and the ratchet ( 22) is configured to include a binding portion 30 is formed with a pole 34 that is supported. Accordingly, it is possible to bind a bookbinding material having various thicknesses and facilitate the bookbinding operation.
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