Disclosed herein is a reed affixing device for a wind instrument. The device includes a puller means disposed on an upper portion of the mouthpiece in a longitudinal direction thereof and having a puller, with hollow portions formed in the puller in the longitudinal direction of the mouthpiece. A string-shaped cord passes through the hollow portions in the form of a unidirectional spiral from a side of the puller to wind around the reed and the mouthpiece at several times, and is secured to first and last hollow portions formed, respectively, in both ends of the puller. An affixing means is fastened to a side of the puller means to secure the reed to the mouthpiece. A pair of sound adjusting members is provided on opposite sides of the reed to be in close contact with the cord that is wound several times, thus adjusting a tone of sound.