PURPOSE: A package box is provided to obtain excellent ventilation property by making the bottom and plane of content have same ventilation property and to prevent the deformation of content by storing the content into a box type. CONSTITUTION: A package box comprises: an upper box(180) having an opened lower part and an upper side with a hole(181); a lower box(110) which is opened upward corresponding to the upper box and has a vent(119) on the bottom of the lower box; and a supporting board(160) which is located inside the lower box and has a ventilation hole(161) corresponding to the vent of the lower box. A third cutting piece(143) of the supporting board is folded upward.
