An object of the present invention is to provide an automatic strap packaging machine that can easily remove a strap ring when performing an empty Strapping and has a simple structure. When the rear end side of the strap is pulled back by the strap pull-back device (84), the detection device detects the amount of pull back. When the result of the detection is greater than a predetermined length and the strap is wrapped around the sliding table, it can be determined that the empty strapping is being performed. Thereafter, the rotation of the camshaft (41) is temporarily stopped based on a signal, whereby the time for performing compression by the intermediate presser member operated after melting the overlapping portion of the strap with the heater (36) is delayed by a predetermined time .
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