A boot band (31, 31A) comprising: - a band body intended to be wound, for clamping in a ring-like form around a member to be clamped, in such a way that it forms an outer-layer portion and an inner layer portion, the outer-layer portion overlapping the inner-layer portion; - a first boot-band pawl that is formed at the end of the top side of the outer-layer portion; - a planar terminal end portion that is formed in the outer-layer portion, and that is located nearer to the top end of the outer-layer portion than the first boot-band pawl is; - a second boot-band pawl that is formed in the inner-layer portion that has an opening into which the terminal end portion can be inserted, and a pressing part that presses, from the outside, the terminal end portion that is inserted into the opening, and that clamps the band body together with the first boot-band pawl so that the band body is reduced in diameter; - a plurality of engagement holes (42, 43) that are formed along the lengthwise direction in the outer-layer portion; an engagement pawl that is formed on the inner-layer portion, and that rises in a slope-like form facing the end of the top side of the outer-layer portion; Said boot band being characterized in that it further comprises a guide means provided at a back end portion of the top-end side engagement hole which is located at the end of the top side of the outer-layer portion, in the lengthwise direction, with the guide means being opposite the engagement pawl, the back face of the engagement pawl being sloped so as to include two stages of angles, an inclination angle β at the beginning of the climbing over and an inclination angle α at the ending of the climbing over, a slope portion of the guide means having an inclination angle γ, and the relationship between the angles α, β, and γ being α < β <γ; and in that, in a state wherein the engagement pawl is inserted into a top-end side engagement hole, a clamping force applied to the band body in the diameter-reducing direction allows the guide means to climb over the back face of the engagement pawl, so that the top-end side engagement hole is moved over the engagement pawl and a following engagement hole is engaged with the engagement pawl. - a band body intended to be wound, for clamping in a ring-like form around a member to be clamped, in such a way that it forms an outer-layer portion and an inner layer portion, the outer-layer portion overlapping the inner-layer portion; - a first boot-band pawl that is formed at the end of the top side of the outer-layer portion; - a planar terminal end portion that is formed in the outer-layer portion, and that is located nearer to the top end of the outer-layer portion than the first boot-band pawl is; - a second boot-band pawl that is formed in the inner-layer portion that has an opening into which the terminal end portion can be inserted, and a pressing part that presses, from the outside, the terminal end portion that is inserted into the opening, and that clamps the band body together with the first boot-band pawl so that the band body is reduced in diameter; - a plurality of engagement holes (42, 43) that are formed along the lengthwise direction in the outer-layer portion;