To provide a packing case with a deodorizing box realizing curtailment of business and sales expenses without needing so much operating effort for spreading the deodorizing box while being able to positively provide a user with the deodorizing box free of charge or at a very low cost.

A separation band 12 is formed of separation lines 10, 11 comprising two perforated lines so as to separate the deodorizing boxes 5, 6 into prescribed shape from a packing case body 2. The separation band 12 is gripped with a hand and pulled apart to detach the deodorizing boxes 5, 6 from the packing case body 2 for use.