Abstract: A plurality of yarn packages are stably held by a pair of protector plates in parallel and non contacting condition to each other so as to form a unit package. The yarn packages are covered with a sheet of film as a whole or separately at a position inside the protector plates. At least one unit package may be packaged in a cardboard box. In a preferable process for making the unit package, a series of successive operations, such as a first protector plate supply, a first film supply, mounting of a predetermined number of yarn packages on the first protector plate by way of the first film, a second film supply on the combined body of the yarn packages with the first protector plate, sealing of the first and second films for wrapping the yarn packages, a second protector plate supply, binding of the first and second protector plates by tapes, packaging at least one unit package in a cardboard box, are successively and intermittently carried out when items are displaced along an assembling conveyer line.