The invention relates to a bidirectionally openable storage box which comprises a shell, a box body, a movable door, a locking device, a sliding mechanism and an elasticity mechanism. When the storage box is closed, the movable door is locked to the shell through the locking mechanism, the box body is locked to the movable door through the locking mechanism and arranged into the shell, the box body is ejected forwards relative to the shell along with a path limited by the sliding mechanism under the forward action of the elasticity mechanism, the movable door is locked to the shell through the locking mechanism, and the box body and the movable door are ejected rearwards together relative to the shell along with the path limited by the sliding mechanism under the rearward action of the elasticity mechanism. The box body can be ejected forwards and rearwards relative to the shell under the action of the elasticity mechanism, particularly, the box body is ejected rearwards, the distance between the storage box and a back-row seat can be shortened, so that a passenger sat on the back row conveniently places articles into the storage box and takes out the articles from storage box, the body of the passenger sitting on the back row cannot move forwards, hands of the passenger sitting on the back row can approach to the storage box, and experience of the passenger sat on the back row is improved.