The present invention is a magazine loader unit for stacking in the magazine to a printed circuit board which is supplied on-line; Forming an airtight space and the airtight chamber body having an inlet door and the exit side door, heater for heating the inside of the sealed chamber body, and a nitrogen supply pipe for supplying a nitrogen gas into the interior of the sealed chamber body, wherein and nitrogen-off valve for opening and closing a nitrogen feed pipe, for making the air supply line for supplying air to the interior of the sealed chamber body, the air opening and closing valve for opening and closing the air supply line, in a vacuum of the inside of the sealed chamber body the vacuum pump and the vacuum pump and the pump, including the opening and closing valve for opening and closing a closed chamber between the body, the closed chamber for receiving a supply magazine filled with nitrogen therein and then heated to perform soldering in a vacuum; Circulation fan for forming an enclosed space and is connected to the cooling chamber body and a cooler having an inlet door and the exit side door supplied with cooling vaporizer for cooling the inside of the cooling chamber body, the cold air of the cooling vaporizer with the magazine and, cooling chambers for supplying cooling accept the magazine passed through the closed chamber including; provides an in-line vacuum reflow apparatus comprising a.