A packaging module for performing at least two operations on flexible containers arranged in a row, said operations being after the actual formation of said containers, such as opening, filling and/or closing said containers, comprising: - a drive chain describing a closed trajectory; - holding means for the suspension of the flexible containers throughout their entire path are attached to said drive chain, wherein each holding means is assigned for suspending a corresponding flexible container throughout its entire path, being said holding means operated by the relative movement of the chain with respect to another preferably static component of the module; characterized in that the packaging module - comprises at least two rotating operational wheels (1, 2, 3, 4) of vertical shafts, at least one of which is motor-operated, said operational wheels being provided with corresponding means for carrying out the respective operations on the containers; - wherein the drive chain is linked with the operational wheels; - wherein the angle of contact (α) of the chain with the operational wheels is greater than 180° - wherein the rotating operational wheels (1, 2, 3, 4) are gear wheels the teeth of which are provided with notches in which corresponding pins linking the consecutive links of the chain in an articulated manner mesh or are inserted, and wherein the packaging module comprises at least one gear deflection wheel arranged outside the closed trajectory of the chain and facing a sector of chain between two adjacent operational wheels (1, 2, 3, 4), the teeth of the at least one gear deflection wheel being provided with notches in which corresponding pins linking the consecutive links of the chain in an articulated manner mesh or are inserted. - a drive chain describing a closed trajectory; - holding means for the suspension of the flexible containers throughout their entire path are attached to said drive chain, wherein each holding means is assigned for suspending a corresponding flexible container throughout its entire path, being said holding means operated by the relative movement of the chain with respect to another preferably static component of the module; characterized in that the packaging module - comprises at least two rotating operational wheels (1, 2, 3, 4) of vertical shafts, at least one of which is motor-operated, said operational wheels being provided with corresponding means for carrying out the respective operations on the containers; - wherein the drive chain is linked with the operational wheels; - wherein the angle of contact (α) of the chain with the operational wheels is greater than 180° - wherein the rotating operational wheels (1, 2, 3, 4) are gear wheels the teeth of which are provided with notches in which corresponding pins linking the consecutive links of the chain in an articulated manner mesh or are inserted, and wherein the packaging module comprises at least one gear deflection wheel arranged outside the closed trajectory of the chain and facing a sector of chain between two adjacent operational wheels (1, 2, 3, 4), the teeth of the at least one gear deflection wheel being provided with notches in which corresponding pins linking the consecutive links of the chain in an articulated manner mesh or are inserted.