PROBLEM TO BE SOLVED: To provide a box body excellent in visibility and easiness-to-take out of the content when opening a lid part.SOLUTION: A box body 1 of the present invention comprises a body 10 having a bottom part, a front wall 12 and a rear wall 13 standing up from the bottom part and having a storage space for opening an upper part, a lid part 20 connected to the body and capable of opening-closing the storage space by rotating around a hinge line of a position lower than an upper end of the rear wall and a bottom plate part 30 having one end connected to the lid part and movably arranged in the storage space to the body, and the bottom plate part comprises a movement part 32b arranged on the bottom part in a closed state of the lid part and a reversal part 32c linked to the movement part by sandwiching a fold line, longer than a height of the rear wall in a dimension in the linking direction and bending toward the front wall in the first direction to the movement part in the closed state of the lid part, and when opening the lid part by a predetermined quantity, the reversal part bends in the second direction opposed to the first direction.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】蓋部を開けた際の内容物の視認性や取り出しやすさに優れた箱体を提供する。【解決手段】本発明の箱体1は、底部および底部から立ちあがる前壁12および後壁13を有し、上方が開放した収容空間を有する本体10と、本体に接続され、後壁の上端よりも低い位置のヒンジ線を中心に回動することで収容空間を開閉可能な蓋部20と、一端が蓋部に接続され、本体に対して移動可能に収容空間内に配置された底板部30とを備え、底板部は、蓋部が閉じられた状態において底部上に配置される移動部32bと、折線を挟んで移動部と連設され、連設方向における寸法が後壁の高さよりも長く、蓋部が閉じられた状態において移動部に対して第一の方向に、かつ前壁に向かって折れ曲がる反転部32cとを有し、蓋部を所定量開くと、反転部が第一の方向と反対の第二の方向に折れ曲がる。【選択図】図1