To provide a packaging box wherein molded parts of resin or expanded styrene which are not preferable from a viewpoint of environmental protection are not used and also cushioning effects can be improved.

A first vertical part 44, a lower horizontal part 45 and a second vertical part 46 for sectioning a digital camera housing space 84 are formed, a third vertical part 71b and a fourth vertical part 80b are formed of a third lower tongue 24 and a fourth lower tongue 25, and a third upper horizontal part 54 and a fourth upper horizontal part 58 are formed of a third upper tongue 30 and a fourth upper tongue 31. Since a rear face of the first vertical part 44 and the second vertical part 46 is supported by a support of the third lower tongue 30 and the fourth lower tongue 31, a packaging box having high product cushioning effects can be provided. Since a cushioning part is integrally formed with a box body, a low cost is realized and no adverse influence is applied to environments.