A method for transferring and filling a viscous material from a container into a dispensing syringe, wherein the syringe comprises: a main body portion having an inner chamber defined by an inner circumferential surface of the main body portion; a tubular portion located at one end of the main body portion, through which the viscous material is to be discharged; an opening located at the opposite end of the main body portion, and a first plug configured to permit a gas flow in one direction, being fitted in the syringe, thereby dividing the chamber within the syringe into a first sub-chamber located between the first plug and the tubular portion and a second sub-chamber located between the first plug and the opening, the method comprising: inserting a rod into the second sub-chamber of the syringe through the opening such that the rod engages with the first plug; and extruding the viscous material from the container and transferring and filling the extruded viscous material into the first sub-chamber of the syringe, wherein a force is applied to the first plug within the syringe via the rod in a direction that allows the volume of the first sub-chamber to reduce to evacuate the first sub-chamber of the syringe because of a gas flow from the first sub-chamber to the second sub-chamber via a radial clearance between the syringe and the first plug during the filling of the viscous material from the container into the first sub-chamber of the syringe. a main body portion having an inner chamber defined by an inner circumferential surface of the main body portion; a tubular portion located at one end of the main body portion, through which the viscous material is to be discharged; an opening located at the opposite end of the main body portion, and a first plug configured to permit a gas flow in one direction, being fitted in the syringe, thereby dividing the chamber within the syringe into a first sub-chamber located between the first plug and the tubular portion and a second sub-chamber located between the first plug and the opening, the method comprising: inserting a rod into the second sub-chamber of the syringe through the opening such that the rod engages with the first plug; and extruding the viscous material from the container and transferring and filling the extruded viscous material into the first sub-chamber of the syringe, wherein a force is applied to the first plug within the syringe via the rod in a direction that allows the volume of the first sub-chamber to reduce to evacuate the first sub-chamber of the syringe because of a gas flow from the first sub-chamber to the second sub-chamber via a radial clearance between the syringe and the first plug during the filling of the viscous material from the container into the first sub-chamber of the syringe. inserting a rod into the second sub-chamber of the syringe through the opening such that the rod engages with the first plug; and extruding the viscous material from the container and transferring and filling the extruded viscous material into the first sub-chamber of the syringe, wherein a force is applied to the first plug within the syringe via the rod in a direction that allows the volume of the first sub-chamber to reduce to evacuate the first sub-chamber of the syringe because of a gas flow from the first sub-chamber to the second sub-chamber via a radial clearance between the syringe and the first plug during the filling of the viscous material from the container into the first sub-chamber of the syringe.