A deep-drawing packaging machine includes a sealing device that clamps and seals a top film and a bottom film by an upper mold and a lower mold, clamping tabs that clamp both-side edges of at least one of the top film and the bottom film, and a carrying device that carries at least one of the top film and the bottom film clamped by the clamping tabs. The clamping tabs are configured such that a gap is generated between the clamping tabs and the top film and the bottom film, positioned in a range clamped by the upper mold and the lower mold, when the upper mold and the lower mold of the sealing device are closed.