A system for conveying electronic cigarette components, comprising: a guide comprising at least one stopping station; a carriage configured to slide along the guide and comprising retaining means for holding at least one component of an electronic cigarette; a locking unit (4, 5, 6) for locking the carriage relative to the guide at the stopping station; characterized in that the locking unit (4, 5, 6) comprises: two abutment elements (4, 5) mounted on the carriage and disposed at a predetermined mutual distance; and an inserting element which is: disposed at the stopping station; shaped in such a way that its first and second edges (610, 620) come into contact with the two abutment elements (4, 5), respectively, when the carriage is at the stopping station; movable between a retracted position, where it does not contact the two abutment elements (4, 5) and allows the carriage to slide relative to the guide, and an advanced position where it contacts the two abutment elements (4, 5), thereby preventing the carriage from sliding relative to the guide; and wherein each abutment element (4, 5) is rotatable about its axis in such a way as to facilitate movement of the inserting element between the two positions (A, R). a guide comprising at least one stopping station; a carriage configured to slide along the guide and comprising retaining means for holding at least one component of an electronic cigarette; a locking unit (4, 5, 6) for locking the carriage relative to the guide at the stopping station; characterized in that the locking unit (4, 5, 6) comprises: two abutment elements (4, 5) mounted on the carriage and disposed at a predetermined mutual distance; and an inserting element which is: disposed at the stopping station; shaped in such a way that its first and second edges (610, 620) come into contact with the two abutment elements (4, 5), respectively, when the carriage is at the stopping station; movable between a retracted position, where it does not contact the two abutment elements (4, 5) and allows the carriage to slide relative to the guide, and an advanced position where it contacts the two abutment elements (4, 5), thereby preventing the carriage from sliding relative to the guide; and wherein each abutment element (4, 5) is rotatable about its axis in such a way as to facilitate movement of the inserting element between the two positions (A, R). two abutment elements (4, 5) mounted on the carriage and disposed at a predetermined mutual distance; and an inserting element which is: disposed at the stopping station; shaped in such a way that its first and second edges (610, 620) come into contact with the two abutment elements (4, 5), respectively, when the carriage is at the stopping station; movable between a retracted position, where it does not contact the two abutment elements (4, 5) and allows the carriage to slide relative to the guide, and an advanced position where it contacts the two abutment elements (4, 5), thereby preventing the carriage from sliding relative to the guide; and wherein each abutment element (4, 5) is rotatable about its axis in such a way as to facilitate movement of the inserting element between the two positions (A, R).