Provided is a package with an opening valve, which has ease of handling and sanitation of the package, and in which a resealing function is not impaired by contents. A packaging body 1 made of a flexible film is broken to form an opening 26, an opening valve 7 below it, and a storage part 27 below it. The opening valve comprises a ridge-folded film 2 comprising a long side part and a short side part, and a heat-bonded lower end 4 of either a lower end of the long side part and a front surface 10 or a back surface 11 of the packaging body, A band-like film 3 partially contacting with the long side and the short side inside the ridge folding part of the ridge folding film, a band-like film lower end heat-fusion part 5 for fusing the lower end of the band-like film to the inside...

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