Packing box

Abstract

Problem to be Solved Provided is a packing box that enables to easily release a slit lock in which slits of an insertion piece of an openable lid engage with side flaps connected to openable lid side edge portions of lid side members, even if the interior of a box body of the packing box is tightly filled with a product. Solution The top face lid () of the packing box () includes a part that can be torn along the tear inducing line () extending from the flap opposing edge () of the top face lid to the front end edge () of the top face lid (), and the part is held and torn along the tear inducing line () by a human hand and is raised up with respect to the top face lid () to form the slit lock release gripping piece () that can be used for releasing engagement created by the slit lock engaging structure (LK), so that the engagement by the slit lock engaging structure (LK), which is the engagement between the insertion piece () and the side flap () in the slit (SL) on the side in the lateral direction of the insertion piece () where the slit lock release gripping piece () is formed, can be easily released even if the interior of the box body of the packing box is tightly filled.