A case for housing elongated objects includes a box body (2), having a size such that the box body can adequately contain the elongated object (O), which is inserted in the body through a front opening (21). The case has a lock the object housed in the case including at least a movable plate (23) arranged along at least a border (24) of the opening (21), movable between an open position wherein the plate impedes the passage from the inside to the outside of the case to the object to be kept and a closed position wherein the plate substantially arranges along at least a side (25) of the box body, in such a way as not to substantially obstruct the opening.