a front sheet (11), a rear sheet (12) and a bottom sheet (13) disposed at a lower portion of the front sheet (11) and the rear sheet (12), which are resin sheets having flexibility, with an article containing portion (2) being formed between these sheets (11, 12, 13),

wherein the article containing portion (2) of the deaeratable bag is adapted to deaerate and store an article (M) that is large in volume because the article includes air by compressing the article including the air, and

when the article (M) is disposed in the article containing portion (2) and disposed so that the bottom portion of the bag move downward, and a weight of the article (M) is supplied to the bottom sheet (13),

wherein the front sheet (11) includes a bottom edge (11d) positioned below and left and right side edges (11b, 11c) that extend upward from both left and right ends of the bottom edge (11d),

wherein the rear sheet (12) includes a bottom edge (12d) positioned below and left and right side edges (12b, 12c) that extend upward from both left and right ends of the bottom edge (12d),

wherein the bottom sheet (13) includes a front bottom surface (13x) and a rear bottom surface (13y) that are partitioned across at least one folding line (13a),

wherein the front bottom surface (13x) includes the folding line (13a), a front bottom edge (13f) positioned below the folding line (13a), and a left front side edge (13b) and a right front side edge (13d) that join both respective left and right ends of the folding line (13a) and the front bottom edge (13f),

wherein the rear bottom surface (13y) includes the folding line (13a), a rear bottom edge (13g) positioned below the folding line (13a), and a left rear side edge (13c) and a right rear side edge (13e) that join both respective left and right ends of the folding line (13a) and the rear bottom edge (13g),

wherein the folding line (13a) is disposed between the front sheet (11) and the rear sheet (12),

wherein the bottom edge (11d) of the front sheet (11) and the front bottom edge (13f) of the bottom sheet (13) are adhered together,

wherein the bottom edge (12d) of the rear sheet (12) and the rear bottom edge (13g) of the bottom sheet (13) are adhered together,

wherein the left and right side edges (11b, 11c) of the front sheet (11) and the left and right side edges (12b, 12c) of the rear sheet (12) are respectively adhered together above the folding line (13a),

wherein a bag body (1) including therein an article containing portion (2) is formed by the bottom edge (11d) of the front sheet (11) and the front bottom edge (13f) of the bottom sheet (13) being adhered together and by the bottom edge (12d) of the rear sheet (12) and the rear bottom edge (13g) of the bottom sheet (13) being adhered together,

wherein an upper edge (11a) of the front sheet (110 and an upper edge (12a) of the rear sheet (12) are not adhered together, but an open portion (3) is formed so that the article (M) can be placed in and taken from the article containing portion (2), and a chuck (31) is attached to the opening portion (3) so that a deaerated state can be maintained when the article containing portion (2) is deaerated,

wherein the bottom sheet (13) is located opposite to the opening portion (3),

wherein a laminate sheet of film selected from a group consisting a polypropylene (11pp, 12pp) film and a polyethylene film (11pe, 12pe), and a biaxially drawn nylon film (11n, 12n) are used for the front sheet (11) and the rear sheet (12),

wherein the bottom sheet (13) is a co-extrusion film including the nylon film (13n) to which drawing has not been administered, and the polyethylene film (13pe) laminated together,

the polyethylene film (13pe) being disposed on at least one of a surface side and an undersurface side of the nylon film (13n), and

wherein the bottom sheet (13) formed of the co-extrusion film, including the nylon film (13n) to which drawing has not been administered and the polyethylene film (13pe) laminated together, is easier to stretch in comparison to the laminate sheet of the biaxially drawn nylon film used for the front sheet (11) and the rear sheet (12), and

wherein the laminate sheet of the bottom sheet (13) is easier to stretch, in comparison to the laminate sheet of the biaxially drawn nylon film used for the front sheet (11) and the rear sheet (12), and the extensibility and tearing resistance of the bottom sheet (13) are higher than the extensibility and tearing resistance of the front sheet (11) and the rear sheet (12),

the bottom sheet (13) having a tensile ductility of 400% to 800%.