A continuous conveying type bag filling and packaging machine including multiple groups of grippers (2) continuously traveling along a racetrack-shaped annular path and, as the grippers (2) complete a single revolution, carries out various packaging operations, wherein a measuring hopper (42) is provided above each elevating hopper (37) and is continuously rotated in conjunction therewith. The measuring hopper (42) has a shutter (44). A weight detector (46), along with a shutter actuation mechanism (47), is provided so as to correspond to each measuring hopper (42) and is continuously rotated in conjunction therewith. If, based on a detection signal from the weight detector (46), it is determined that the weight of the material to be packaged that is supplied to the measuring hopper (42) exceeds the upper limit value of the allowable range, the corresponding shutter actuation mechanism (47) is not actuated, and the shutter (44) is maintained closed.