PROBLEM TO BE SOLVED: To reduce a remaining viscous substance to an extremely small quantity, and simply mount and dismount an extrusion container for the viscous substance.;SOLUTION: An extrusion gun 10 for a viscous substance includes a cylinder 15, a holding part 11 provided at one of ends of the cylinder 15 via a coupling member 18, a head 16 detachably provided at the other end of the cylinder 15, a rod 13 equipped with a presser 14, and a rod driving mechanism for inching the presser together with a rod each time a trigger 12 provided on the holding part 11 is drawn. A tapered inner wall surface 17 is provided on the top plate 16a of a head 16. On the other hand, the presser 14 has, on the lateral face reverse to the rod, a swelling top face 14d protruding in a steplike manner from the side of the outer peripheral surface 14a sequentially via a tapered slope 14b and a curved surface 14c from the slope 14b, while the inclination of the slope 14b is smaller than that of the tapered inner wall surface 17 of the head 16.;COPYRIGHT: (C)2004,JPO
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