To smoothly and beautifully wind a pressure-sensitive adhesive tape on a body to be bundled such as an electric wire by solve elongation and difficulty of peeling of the pressure-sensitive adhesive tape even when the pressure-sensitive adhesive tape with high elongation and high self-bonding properties is used.

A pressure-sensitive adhesive tape delivering mechanism 5 is equipped with a shaft part 27 for supporting freely rotatably a reel 16 for the pressure-sensitive adhesive tape, a rotating plate 19 provided with the shaft part at its center, a oneway bearing 20 which a non-tacky face of the pressure-sensitive adhesive tape 17 unwound from the reel for the pressure-sensitive adhesive tape goes along, and a means for rotating the oneway bearing with the rotating plate 19 while the oneway bearing is rotated on its own axis. A guide member 21 for receiving the pressure-sensitive adhesive tape 17 from the oneway bearing 20 is arranged near the outer periphery of the rotating plate 19. The means for rotating the oneway bearing 20 while it is rotated on its own axis is composed of a small gear 23 provided on the shaft part 22 of the oneway bearing, and a fixed gear 24 intermeshing the small gear.