Provided is a boot band that is configured for preventing the occurrence of buckling in the inner-layer portion of a band body. In the boot band, by applying a diameter-reducing tightening force on the band body when an engagement pawl of an inner-layer portion of the band body has entered a top-end engagement hole of an outer-layer portion of the band body, the top-end engagement hole rides over the engagement pawl. Buckling is prevented by providing, at the area of the top-end engagement hole opposite where the engagement pawl enters therein, a guide that faces the engagement pawl.