To provide a vertical mold bag-making filling package machine which can avoid giving damage to a lateral seal part by not allowing impulses to act to the lateral seal part formed already, when a standby order has been released to the vertical mold bag-making filling package machine which is in the standby condition.SOLUTION: In a vertical mold bag-making filling package machine, when a standby drive mode in a state that a lateral seal device 54 opens is released, a control device restarts a packaging action from throwing products S in a bag B. At this time, both lateral seal blocks 54a, 54b do not contact with the lateral seal part, but the lateral seal device 54 is controlled in a half closing state closed to a slightly opening extent. When products S are thrown in the bag B, impulse forces of the falling products S are received by lateral sealing blocks 54a, 54b in a half closing state, and as being never peeled off by acting directly to a lateral sealing part Se as soon as being formed to the bottom of the bag B, occurring of sealing defective goods can be prevented.SELECTED DRAWING: Figure 2
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