A transfer unit to transfer wraps containing groups of smoking articles changing the mutual distance thereof; the transfer unit comprises: at least two transfer pockets (30, 31), each designed to house a respective wrap; at least one first output station; one single input station; an insertion device, which is configured to simultaneously insert two wraps, which are arranged at an input distance from one another, into the transfer pockets (30, 31), which are together in the input station; an extracting device, which is configured to simultaneously extract two wraps, which are arranged at an output distance from one another, which is different from the input distance, from the transfer pockets (30, 31), which are together in the first output station, so as to insert the two wraps into at least one feeding pocket of a feeding conveyor; and a first moving device, which is configured to simultaneously move the two transfer pockets (30, 31) between the input station and the first output station; the transfer unit is characterised in that: the extracting device is configured to simultaneously insert the two wraps into two respective and different feeding pockets of the feeding conveyor; and the first moving device is configured to simultaneously move, along a moving direction, the two transfer pockets (30, 31) between the input station and the first output station causing the two transfer pockets (30, 31) to travel strokes (C1, C2) with a different length. at least two transfer pockets (30, 31), each designed to house a respective wrap; at least one first output station; one single input station; an insertion device, which is configured to simultaneously insert two wraps, which are arranged at an input distance from one another, into the transfer pockets (30, 31), which are together in the input station; an extracting device, which is configured to simultaneously extract two wraps, which are arranged at an output distance from one another, which is different from the input distance, from the transfer pockets (30, 31), which are together in the first output station, so as to insert the two wraps into at least one feeding pocket of a feeding conveyor; and a first moving device, which is configured to simultaneously move the two transfer pockets (30, 31) between the input station and the first output station; the transfer unit is characterised in that: the extracting device is configured to simultaneously insert the two wraps into two respective and different feeding pockets of the feeding conveyor; and the first moving device is configured to simultaneously move, along a moving direction, the two transfer pockets (30, 31) between the input station and the first output station causing the two transfer pockets (30, 31) to travel strokes (C1, C2) with a different length. the extracting device is configured to simultaneously insert the two wraps into two respective and different feeding pockets of the feeding conveyor; and the first moving device is configured to simultaneously move, along a moving direction, the two transfer pockets (30, 31) between the input station and the first output station causing the two transfer pockets (30, 31) to travel strokes (C1, C2) with a different length.