In order to adjust the distance between the scapula pads (18) and the lumbar pad (15) so that the rucksack will fit confortably on users of different torso length, the scapula pads (18) are mounted on a transverse plate (16) which is slideable on vertical frame members 13, e.g. by means of runners (17). The scapula pad position can thus be adjusted steplessly and also quickly and easily whilst the rucksack is actually on the user's back. Optional dependent straps (19) facilitate adjustment by the user him/herself. The position of pads (24) on the hip belt (23) may also be adjusted to suit users of different physical build.