A steam-releasing pouch comprising: two laminated sheets (21, 22) forming an accommodation compartment that accommodates a content; a sealing portion that seals the two laminated sheets (21, 22) to form an opening that opens part of the accommodation compartment; and a steam-releasing sealing portion formed in the sealing portion to open as pressure of the accommodation compartment increases in a state in which the opening is sealed, wherein the steam-releasing sealing portion includes a first sealant layer having at least a first base layer that faces the accommodation compartment and a second base layer laminated with the first base layer and a second sealant layer having at least a third base layer that faces the accommodation compartment and a fourth base layer laminated with the third base layer, and the first base layer and the third base layer are joined together, characterized in that the steam-releasing sealing portion is arranged in a projection which is formed by folding one of the two sheets (21, 22), the projection includes a folding line that extends along a peak of the projection, the steam-releasing sealing portion includes a first sealing portion, a second sealing portion, a third sealing portion, a fourth sealing portion, a fifth sealing portion, a sixth sealing portion, and a seventh sealing portion, the first sealing portion is arranged on one edge of the steam-releasing pouch in a widthwise direction, the second sealing portion is continuous with the first sealing portion and with the third sealing portion, and extends in parallel with the folding line, the third sealing portion is inclined toward the folding line from one side toward the other side of the steam-releasing pouch in the widthwise direction, the fourth sealing portion is continuous with the third sealing portion and is recessed away from the folding line, the fifth sealing portion is continuous with the fourth sealing portion and is inclined away from the folding line from the one side toward the other side of the steam-releasing pouch in the widthwise direction, the sixth sealing portion is continuous with the fifth sealing portion and the seventh sealing portion, and extends in parallel with the folding line, and the seventh sealing portion is arranged on the other edge of the steam-releasing pouch in the widthwise direction. two laminated sheets (21, 22) forming an accommodation compartment that accommodates a content; a sealing portion that seals the two laminated sheets (21, 22) to form an opening that opens part of the accommodation compartment; and a steam-releasing sealing portion formed in the sealing portion to open as pressure of the accommodation compartment increases in a state in which the opening is sealed, wherein the steam-releasing sealing portion includes a first sealant layer having at least a first base layer that faces the accommodation compartment and a second base layer laminated with the first base layer and a second sealant layer having at least a third base layer that faces the accommodation compartment and a fourth base layer laminated with the third base layer, and the first base layer and the third base layer are joined together, the steam-releasing sealing portion is arranged in a projection which is formed by folding one of the two sheets (21, 22), the projection includes a folding line that extends along a peak of the projection, the steam-releasing sealing portion includes a first sealing portion, a second sealing portion, a third sealing portion, a fourth sealing portion, a fifth sealing portion, a sixth sealing portion, and a seventh sealing portion, the first sealing portion is arranged on one edge of the steam-releasing pouch in a widthwise direction, the second sealing portion is continuous with the first sealing portion and with the third sealing portion, and extends in parallel with the folding line, the third sealing portion is inclined toward the folding line from one side toward the other side of the steam-releasing pouch in the widthwise direction, the fourth sealing portion is continuous with the third sealing portion and is recessed away from the folding line, the fifth sealing portion is continuous with the fourth sealing portion and is inclined away from the folding line from the one side toward the other side of the steam-releasing pouch in the widthwise direction, the sixth sealing portion is continuous with the fifth sealing portion and the seventh sealing portion, and extends in parallel with the folding line, and the seventh sealing portion is arranged on the other edge of the steam-releasing pouch in the widthwise direction.