A removable closure device for a space inside an aircraft includes:



a frame comprising at least one upright said frame comprising at least one fixation interface including a structural element,
a curtain assembly comprising a flexible curtain and
at least one guiding device or ensuring a translational guiding of the flexible curtain with respect to the upright so that the flexible curtain s able to be moved in a direction of movement parallel to a longitudinal direction of the upright between a stowed position, in which the flexible curtain s released from the space, and a deployed position, in which the flexible curtain closes the space.