PROBLEM TO BE SOLVED: To provide a packing box in which seedlings do not fall down or tilt even if the packing box is inverted or fallen sideways and breakage of the seedlings by falling down or tilting can be prevented, and packed seedlings packed by the packing box.SOLUTION: A packing box is a rectangular parallelepiped packing box comprising a housing space capable of housing articles, placing parts on which articles to be housed in the housing space can be placed, an opening part where articles can be put in or out onto the placing parts, and an opening/closing lid capable of opening/closing the opening part, wherein a pressure piece and a support piece are provided, sandwiching the placing parts, the pressure piece is vertically arranged at the opening part side of the placing parts, the support piece is vertically arranged at the innermost side than the placing part, the pressure part and the support part face each other, sandwiching the placing parts, the pressure piece and support piece pressure-clamps the articles placed on the placing parts, and the opening/closing lid can close the opening part from outside the pressure piece. The packing box can be formed by folding corrugated cardboard.COPYRIGHT: (C)2016,JPO&INPIT【課題】 梱包箱が逆さま或いは横倒しになっても苗が転倒や傾倒せず、転倒や傾倒による苗の折損を防止可能な梱包箱と、その梱包箱で梱包した梱包苗を提供する。【解決手段】 物品を収容可能な収容空間と、収容空間に収容する物品を載置できる載置部と、載置部に物品を出し入れできる開口部と、開口部を開閉可能な開閉蓋を備えた直方体の梱包箱において、前記載置部を挟んで対向する押し片と支持片を備え、前記押し片は載置部の開口部側に立設され、支持片は載置部よりも奥側に立設されて、当該押し片と支持片は載置部を挟んで対向し、前記押し片と支持片は載置部に載置した物品を圧迫挟持し、前記開閉蓋は前記押し片の外から開口部を閉塞することができるようにした梱包箱である。この梱包箱は段ボールを折り曲げて形成することもできる。【選択図】図1