Product-containing outer bag, bag feeding device, and supply method

A product-containing outer bag in which a plurality of bags, as products, stacked in a row continuously or intermittently, with the bags partially overlapping each other, are wrapped and integrated with an outer bag, for outer packaging, having a resin film as a base material such that a state of stacking the bags is maintained,

• wherein the outer bag includes:
• a first side;
• a second side opposite to the first side;
• an adhesive seal connecting an end of the first side and an end of the second side opposite to each other;
• and a held portion that is held upon supporting the product-containing outer bag in a state of being suspended such that the second side is below the first side,
• wherein the outer bag further includes a thick portion disposed along an edge of the first side,
• wherein
• the outer bag further includes a first opening opened along an edge of the first side, a first fitting tool disposed, as the thick portion, on an inner wall side of the base material along an edge of the first opening, a second opening opened along an edge of the second side, and a second fitting tool disposed on an inner wall side of the base material along an edge of the second opening,
• the first fitting tool and the second fitting tool are engaged with each other, and
• one or both of the first fitting tool and the second fitting tool include a weak engagement portion in one or both of portions adjacent to the adhesive seal.