There is described a magazine (1) for sheet packaging elements (2) in which side portions (4a) of said packaging elements (2) are held in a vertical position by transport and support branches (15, 18, 20) of main and secondary units (6, 8, 9) and said packaging elements (2) are advanced in respective conveying spaces (16, 19, 21) along a path (P) parallel to said transport and support branches (15, 18, 20) of said main and secondary units (6, 8, 9). The packaging elements (2) are advanced along said path (P) from an inlet section (7) to an outlet section (12). During conveying, batches (3) of packaging elements (2) are formed between an accumulation unit (8) and an auxiliary conveying unit (9) so that said packaging elements (2) are advanced in said batches (3) towards an end packaging station.