Bag product containing frozen food

A frozen food-containing bag product constructed such that a frozen food contained in a bag can be thawed or heated using a microwave oven and the thawed or heated food can be eaten while being kept in the bag without being transferred to another container, wherein:

• the bag is formed using a film material so as to comprise
• a pair of front and back principal-surface film portions, each having a rectangular front-view shape, and
• a side-surface film portion being folded inward in a V-shape and tucked-in at a section extending along at least one of long-side portions which exist on both sides of each of the principal-surface film portions;
• sections respectively extending along short-side portions, which exist on both sides of each of the front and back principal-surface film portions, are each joined together as joint portions, to thereby seal the frozen food inside the bag;
• a steam discharging portion is formed in one of the front and back principal-surface film portions;
• in each of the joint portions respectively formed along the short-side portions on both sides of the pair of front and back principal-surface film portions,
• the side-surface film portion folded inward in a V-shape is not joined together, and
• an end of the side-surface film portion is joined only to the front and back principal-surface film portions' ends extending along the respective short-side portions on both sides of the pair of front and back principal-surface film portions, to thereby form a joint region formed so as to expand in a V-shape, the joint region being formed by joining the side-surface film portion's end and the principal-surface film portions' ends extending along the short-side portion;
• and
• the frozen food-containing bag product is constructed such that, in a state where the bag, containing the thawed or heated food and having been taken out from a microwave oven, is arranged in a manner that the side-surface film portion on the side of one of the long-side portions of the principal-surface film portions comes to a lower side, the inwardly-folded V-shape state of the side-surface film portion arranged on the lower side is opened-up by employing a weight of the thawed or heated food, and the side-surface film portion, which is arranged on the lower side and whose inwardly-folded state has been opened-up, serves as a placement portion and is placed on a receiving surface, on which the bag is to be placed, by employing the weight of the thawed or heated food, and
• a section on the side of the other long-side portion of the principal-surface film portions is cut away along a long-side direction to thereby form a take-out opening in a manner that the food can be taken out through the formed take-out opening and be eaten.