A side loading packaging machine for packaging articles in containers including: a section for forming containers starting from die-cuttings, comprising at least one feeding device, a loading section, a closing section, substantially aligned along a longitudinal axis of the machine; a conveyor equipped with transportation members configured to carry at least one of said containers, wherein said conveyor includes a motor arranged to drive the advance of said transportation members or groups thereof in an independent manner, and the machine operates with: a continuous formation of boxes, said feeding member working with a continuous movement and with a constant rate over time, and said transportation members advancing with a continuous movement at said forming section; and a static loading, said transportation members being stationary during the loading of articles into the containers.