Abstract: The present invention relates to a machine (10) for packaging a product or products (28) in a cardboard box (12), which comprises boxing means arranged along a longitudinal packaging line (16) comprising a first station (A) for making up a box blank (14) and which comprises a conveying device (30) for transfer, in an outbound path, the box (12A) made up at the station (A) to a second, filling, station (B) for boxing the products (28) then on to a third station (C) where the box (12C) is sealed before it is discharged from the machine (10), characterized in that the conveyor device (30) comprises a carriage (32) which is mounted to be able to move longitudinally between an extreme upstream position and an extreme downstream position, and which bears box transfer means (34) comprising at least a first gripper (36) for transferring a made-up box (12A) from the first station (A) to the second station (B) and a second gripper (38) for simultaneously transferring another, filled, box (12B) from the second station (