PURPOSE: A packing box is provided to improve durability due to a pillar plate playing as a role as a pillar when the packing box is laminated and to enlarge inner accepting space due to a front plate and a rear plate which form the side of the packing box. CONSTITUTION: A packing box comprises: a lower plate(10); left and right plates(20) which are bent; left and right upper plates(21) having an insertion piece(22) on both sides of the plate; a laminate protrusion(24) which is protruded on a bent line of the left and right upper plates; front and rear plates(30) which are one-folded; a binding plate(32) having a binding slit(32b); a front and rear upper plates(31) in which an insertion hole(35) is penetrated; a pillar plate(33) which is two-folded; and a pillar protrusion(34) which is protruded on a folded line(33b) of the pillar plate.
