Abstract: The invention concerns a device for synchronizing a series of packaging machines positioned along a chain conveyor, expecially in the confections industry, that is intended for use when articles are to be packaged individually in one packaging machine and supplied to a downstream packaging machine for packaging as a set, characterized in that a chain-and-pusher buffer is interposed in the chain-conveyor section (C) connecting two (A & B) of the packaging machines and carrying the pushers (6) for the individually packaged articles (1) and in that each packaging machine (A & B) has its own chain-drive mechanism (8 and 9 respectively), both of which are connected to one set of electronic controls that carry out the synchronization.