Abstract: Process and machine for packing pasty, liquid or semiliquid products comprising: nonstop feeding two sheets (1, 2) sandwiching ducts (3) ending in nozzles (4) feeding pasty, liquid or semiliquid products to be packed (M); nonstop longitudinally sealing the said sheets (1, 2) through longitudinal continuous beads (5) adjacent to the said continuous sleeves (6); forming through the said longitudinal sealing narrowings arranged at intervals longitudinally regular in the said sleeves (6) making possible the passage of the said ducts (3) and defining in the sleeves (6) long, wide lengths (8) and short narrow lengths (9); nonstop injecting with nozzles (4) material (M) within the said sleeves (6) which are inflated forming units (28) of material (M) with prior pressure closing of a narrow length (9) each sleeve advanced to each nozzle (4) while the sheets (1, 2) are moving forwards, and pressure closing and transversally sealing at regular intervals the said sleeves (6) filled with material (M).