TWI859223B

An extraction bag 1A according to the present invention is provided with a bag body 3 made of a water-permeable filter sheet, a thin plate member 10 disposed on an outer surface of the bag body 3 and an extraction material M filled in the bag body 3. The bag body 3 has two opposite surfaces 3x and 3y and an upper edge 3a, and the thin plate member 10 has a holding part 11 extending on one single surface 3x of the two surfaces in a vertical direction of the bag body. An upper part of the holding part 11 is fixed to an upper part of the single surface 3x, and a lower part of the holding part 11 may be lifted rom the single surface 3x. A longitudinal folded line L1, capable of folding the lower part, in the vertical direction of the bag body is disposed on the lower part of the holding part 11, and a pair of inclined folded lines L2 extending from the side in an opposite direction of the holding part 11 to an upper end of the longitudinal folded line L1 or an extension line thereof is formed on the liftable part