To easily adjust the length of a transmission band while the transmission band is stretched as it is in a short time regardless of the degree of the elongation of the transmission band, and to adjust the length without cutting a part of it.

This transmission band connection device is composed of a clamp part 21 for fastening one of both end parts 9a and 9b of the transmission band, a required fixing means for fixing the other end part of the transmission band and a transmission band winding part 22 for winding one end part of the transmission band. The clamp part 21, the fixing means and the transmission band winding part 22 can be provided on a plate body 20 for fixation made fixable to a traveling body.