A partition former for inhabitable spaces, particularly one for separating and/or decorating private or public open-air spaces, without excluding the possible application thereof to interior decoration, which, being of the type comprising support members and enclosure panels complemented by mutual connecting means, wherein the support members are formed by the association of an upright member (1) to a base member (2), at one end thereof, and a capping member (3), at the other end thereof and the connecting means (4) are formed by members having a generally rectangular cross section which, along one longitudinal edge (19) thereof, mate with longitudinal slots (9) of the tubular members (7) of the uprights (1), while, along the other longitudinal edge thereof (20), they mate with the edges of the enclosure panels (6), which are formed by an integral flattened body member provided with a plurality of through apertures regularly spaced over the surface thereof. The preferred uses are for gardens, terraces, restaurants, bars, exhibitions, fairs, festivals, shows, congress halls, auditoriums, airports, railway stations, and parks.