A folding apparatus for a continuous web being fed in a plant for the production of hygienic absorbent articles and intended to be folded into a "V" or "U" shape in a first and in a second longitudinal portion (101, 102) according to a longitudinal folding line parallel to a feeding line of the web, said folding apparatus comprising - a folding section comprising - an infeed section, at which the continuous web is not folded, and an outfeed section, positioned downstream of the infeed section according to a web feeding direction, at which the continuous web is folded into a "V" or "U" shape and has the first portion and the second portion set at an angle to each other; characterised in that - the folding section further comprises - a first suction belt for feeding the continuous web comprising at least one first stretch movable in a first feeding direction (Va) for feeding a first edge of the continuous web and dragging the first portion of the continuous web; and - a second suction belt for feeding the continuous web comprising at least one second stretch movable in a second feeding direction (Vb) for feeding a second edge and dragging the second portion of the continuous web, said first and second belt (3, 4) being positioned on opposite sides of a lying plane of the folding line orthogonal to a lying plane of the continuous web upstream of the folding section; and in that the folding apparatus further comprises - an adjusting system for a relative position of the longitudinal edges (100a, 100b) of the continuous web once it has been folded, said adjusting system comprising at least one first sensor positioned downstream of the folding section and configured for checking a relative position of the longitudinal edges (100a, 100b) of the continuous web once it has been folded, at least one first actuator operatively connected to said first belt and/or said second belt, a computerised control unit in communication with the first sensor and with the first actuator; wherein the positions of said first belt and/or said second belt (3, 4) are adjustable and said adjusting system is configured to adjust using feedback, by means of the first actuator, the position of said first belt and/or of said second belt depending on at least a first information sent by the first sensor to the computerised control unit. - a folding section comprising - an infeed section, at which the continuous web is not folded, and an outfeed section, positioned downstream of the infeed section according to a web feeding direction, at which the continuous web is folded into a "V" or "U" shape and has the first portion and the second portion set at an angle to each other; characterised in that - an infeed section, at which the continuous web is not folded, and an outfeed section, positioned downstream of the infeed section according to a web feeding direction, at which the continuous web is folded into a "V" or "U" shape and has the first portion and the second portion set at an angle to each other; - the folding section further comprises - a first suction belt for feeding the continuous web comprising at least one first stretch movable in a first feeding direction (Va) for feeding a first edge of the continuous web and dragging the first portion of the continuous web; and - a second suction belt for feeding the continuous web comprising at least one second stretch movable in a second feeding direction (Vb) for feeding a second edge and dragging the second portion of the continuous web, said first and second belt (3, 4) being positioned on opposite sides of a lying plane of the folding line orthogonal to a lying plane of the continuous web upstream of the folding section; and in that the folding apparatus further comprises - a first suction belt for feeding the continuous web comprising at least one first stretch movable in a first feeding direction (Va) for feeding a first edge of the continuous web and dragging the first portion of the continuous web; and - a second suction belt for feeding the continuous web comprising at least one second stretch movable in a second feeding direction (Vb) for feeding a second edge and dragging the second portion of the continuous web, said first and second belt (3, 4) being positioned on opposite sides of a lying plane of the folding line orthogonal to a lying plane of the continuous web upstream of the folding section; - an adjusting system for a relative position of the longitudinal edges (100a, 100b) of the continuous web once it has been folded, said adjusting system comprising at least one first sensor positioned downstream of the folding section and configured for checking a relative position of the longitudinal edges (100a, 100b) of the continuous web once it has been folded, at least one first actuator operatively connected to said first belt and/or said second belt, a computerised control unit in communication with the first sensor and with the first actuator;