The present invention comprises greenhouse comprising a frame provided with columns and with parallel, equally spaced girders supported by said columns, as well as a roof supported by said columns and with at least one wall, said greenhouse comprising a screen device along the roof, which screen device comprises a number of screens, a screen (1) being connected, via first connecting means, to a girder on a first longitudinal side and being connected, via second connecting means, to a front bar (2) extending parallel to the girders on a second longitudinal side opposite said first longitudinal side, which front bar is movable in a direction transversely to its longitudinal direction between an open position and a closed position, said second connecting means comprising a lace element (3) connected to the screen near a longitudinal edge of the screen and a lace chamber (4) associated with the front bar, which lace chamber extends parallel to the longitudinal direction of the front bar, in which lace element is retained, which lace chamber has a passage extending parallel to the front bar for inserting the lace element into the lace chamber from an end face of the front bar, through which passage the screen extends in use, which lace element is strip-shaped.
