Provided is a carton that can stably and reliably hold an article, has a buffering function, and is suitable for automatic box making. A rectangular carton 1 comprises: A right adhesive plate 16 stuck to a right side surface plate 15; a right support plate 17 extending horizontally from the right adhesive plate; a lower right support plate 18 vertically downward from the right support plate to a bottom surface plate 10; A lower left support plate 20 vertically upward from the bottom adhesive plate; a left support plate 21 horizontally extending from the lower left support plate to the left side plate; and a left adhesive plate 22 extending from the left support plate and stuck to the left side plate 14, A curved notch 181 is provided on the lower right support plate and the lower left support plate along the shape of the end in the long...

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