To provide a returnable box which makes it possible to take out a content from a side by opening one side face only without opening a top lid.

A rectangular parallelepiped container includes a bottom part 2, front/back and right/left sides 3-6 and a top lid 7. The joint of the sides is openable/closable by moving up and down the slider 81 of a slide fastener 8. Preferably, a protective cloth piece covering teeth 82 is provided inwardly along the teeth for not exposing the teeth.