An extraction bag comprising: a bag body which is packaged by sealing of a packaging material having flexibility and is three-dimensionally formed in a triangular pyramid shape with four triangular shape faces (7,9,11 and 13); a cover material which covers partially two of the triangular surfaces (7, 13) on the outer surface of the packaging material, and is integrated with the packaging material by edge sealing portions (23, 25) formed on a pair of opposing edges thereof, thus forming a pocket-Like shape; point sealing portions (29, 31), at least one of which is provided on both inner sides of the edge sealing portions, and which point-seals the cover material and the packaging material wherein the cover material defines an opening and outlets (S1,S2) between the edge ends of the edge sealing portions (23, 25) and the respective point sealing portions (29, 31); and two hanging threads (35,43) of which base end sides are sealed in the bag body or the cover material to form a base end sealing portion (39,47), wherein the base end sealing portion of one tag-attached hanging thread is provided in said pocket formed of the cover material integrated with the packaging material, the hanging thread tracing an S in the vicinity of both sides of the two point sealing portions (29, 31), and the base end sealing portion of the other hanging thread is provided on the packaging material sheet which is exposed to the outside, the hanging thread tracing a U in the vicinity of both sides of the two point sealing portions (29, 31); wherein one hanging thread is drawn so that both sides of the point sealing portions and an edge end of one edge sealing portion become supporting points when pulling, and the other hanging thread is drawn so that both sides of the point sealing portions and an edge end of the other edge sealing portion become supporting points when pulling, when pulling the hanging thread towards outside of one side and the other hanging thread towards outside of the other side, in opposite directions to each other, the packaging material is squeezed by the base end sealing portion and the point sealing portion approaching one position. a bag body which is packaged by sealing of a packaging material having flexibility and is three-dimensionally formed in a triangular pyramid shape with four triangular shape faces (7,9,11 and 13); a cover material which covers partially two of the triangular surfaces (7, 13) on the outer surface of the packaging material, and is integrated with the packaging material by edge sealing portions (23, 25) formed on a pair of opposing edges thereof, thus forming a pocket-Like shape; point sealing portions (29, 31), at least one of which is provided on both inner sides of the edge sealing portions, and which point-seals the cover material and the packaging material wherein the cover material defines an opening and outlets (S1,S2) between the edge ends of the edge sealing portions (23, 25) and the respective point sealing portions (29, 31); and two hanging threads (35,43) of which base end sides are sealed in the bag body or the cover material to form a base end sealing portion (39,47), wherein the base end sealing portion of one tag-attached hanging thread is provided in said pocket formed of the cover material integrated with the packaging material, the hanging thread tracing an S in the vicinity of both sides of the two point sealing portions (29, 31), and the base end sealing portion of the other hanging thread is provided on the packaging material sheet which is exposed to the outside, the hanging thread tracing a U in the vicinity of both sides of the two point sealing portions (29, 31); wherein one hanging thread is drawn so that both sides of the point sealing portions and an edge end of one edge sealing portion become supporting points when pulling, and the other hanging thread is drawn so that both sides of the point sealing portions and an edge end of the other edge sealing portion become supporting points when pulling, when pulling the hanging thread towards outside of one side and the other hanging thread towards outside of the other side, in opposite directions to each other, the packaging material is squeezed by the base end sealing portion and the point sealing portion approaching one position.