PURPOSE: To make it possible to fourfold-package and eightfold-package objects to be packaged by a method wherein it is made possible to perform longitudinal and cross sealings respectively to a film for a fourfold object which is arranged in the vicinity of a carry-in port for the fourfold object and a film for an eightfold object which is arranged in the vicinity of a carry-in port for the eightfold object, by sealers which are provided around a conveyor.

CONSTITUTION: A carry-in port 4 and a carry-out port 5 for a fourfold object are provided at both ends of a fourfold transfer path 3 along the running direction of a conveyor 2, and in the meantime, a carry-in port 7 for an eightfold object is provided at one end of an eightfold transfer path 6 which is joined to the fourfold transfer path 3 in a trident state. For films 8, 9 for an fourfold object which are arranged at the upper side and lower side in the vicinity of the carry-in port 4 for a fourfold object, and films 10, 11 for an eightfold object which are arranged at the upper side and lower side in the vicinity of the carry-in port 7 for an eightfold object, longitudinal seal L and cross seal C can be sealed by a long sized sealer with cutter 12 and a short sized sealer with cutter 13, and a short sized sealer 14 and a short sized sealer 15, which are provided around the conveyors 2, 2.