Abstract: The device for adjusting the carrying position of a rucksack consists of a rucksack back (1) on which a carrying harness (3) is positioned, characterized in that it comprises two means for controlling and adjusting the position (M1-M2), established with the aid of remote manual controls which are autonomous in relation to each other and which enable the position of the back of the sack to be adjusted in relation to the carrying harness, whereby the first means enables the back of the sack to be raised in relation to the harness and the second means enables the back of the sack to be lowered in relation to the harness, so that the dimensions of the back of the rucksack to the person carrying said rucksack can be adjusted the support areas can be modified during walking in order to reduce any injuries that might occur.