A modular structure (1) for temporary exhibitions which comprises at least one shaft component (2), at least one sheet (3) with at least one fixed end (3a), which is fastened to the shaft component (2) and at least one free end (3b) opposite the fixed end (3a), and a releasable fastening mechanism (11) capable of fixing the free end (3a) to the shaft component (2) and in which the shaft component (2), comprises a rolling device suitable for rolling the sheet (3).