Provided is an emergency shelter that is able to occupy a first, folded position for storage and transport and a second deployed position that is suitable for sheltering at least one person, a method for reversibly converting the shelter from this first position to this second position, and a module of contiguous shelters of this kind. The emergency shelter includes an inflatable tent and a retention device in the form of a column that is preassembled with the inflated tent in said second position. The column is suitable for inflating the tent and holding it deployed around the former in said second position.