A device for feeding blanks to a machine for further processing in particular to a packing machine, comprising: - feed means for feeding a stack of blanks disposed in succession in a superposed configuration; - at least one stop element disposed at a first end of the stack of blanks and configured to retain the stack of blanks; wherein the feed means are configured to feed the stack of blanks in such a way that the stack of blanks is subjected to a pushing action in the direction of the at least one stop element (4, 4a), in particular by gravity and/or by means of a pushing member applied to a second end of the stack, opposite to the first end; the feed means also comprise at least one compensating belt having an upper section running parallel to the feed direction of the stack of blanks and defining a bottom support of a predefined portion of the stack of blanks so that the predefined portion of the stack rests, preferably rests exclusively on, the upper section of the at least one compensating belt, and in that the compensating belt is associated with adjustment means configured to adjust the feed speed of the compensating belt in such a way as to vary the thrust on the stop element; characterized in that the compensating belt is a suction belt connected to a pneumatic suction source and in that the device comprises, between the at least one compensating belt and the at least one stop element (4, 4a), at least one aligning belt disposed and/or configured to come into local contact with an outfeed end stretch of the stack of blanks and in such a way as to ensure that each blank of the outfeed end stretch is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt. - feed means for feeding a stack of blanks disposed in succession in a superposed configuration; - at least one stop element disposed at a first end of the stack of blanks and configured to retain the stack of blanks; wherein the feed means are configured to feed the stack of blanks in such a way that the stack of blanks is subjected to a pushing action in the direction of the at least one stop element (4, 4a), in particular by gravity and/or by means of a pushing member applied to a second end of the stack, opposite to the first end; the feed means also comprise at least one compensating belt having an upper section running parallel to the feed direction of the stack of blanks and defining a bottom support of a predefined portion of the stack of blanks so that the predefined portion of the stack rests, preferably rests exclusively on, the upper section of the at least one compensating belt, and in that the compensating belt is associated with adjustment means configured to adjust the feed speed of the compensating belt in such a way as to vary the thrust on the stop element; characterized in that the compensating belt is a suction belt connected to a pneumatic suction source and in that the device comprises, between the at least one compensating belt and the at least one stop element (4, 4a), at least one aligning belt disposed and/or configured to come into local contact with an outfeed end stretch of the stack of blanks and in such a way as to ensure that each blank of the outfeed end stretch is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt.