Field experiments were carried out at the experimental farm of EL-Gemmiza Agricultural Research Station, EL-Gharbia Governorate, Agricultural Research Center (ARC) Egypt during the two successive seasons of 2019/2020 and 2020/2021 to study yield, quality and water use efficiency of four flax varieties viz., Giza 12, Giza 11, Sakha 6 (local dual purpose type varieties) and Iriana variety (introduced fiber one) as responded to three different irrigation treatments (1, 2 or 3 irrigations) added during growing season after sowing irrigation. A significant interaction effect was observed between the three studied irrigation treatments and the four tested flax varieties on straw characters i.e., total plant height, main stem diameter, straw yield fed-1, fiber yield fed-1, total fiber %, and fiber fineness. The highest values of total plant height, main stem diameter, straw yield fed-1, fiber yield fed-1, and total fiber % were obtained from the Giza 12 variety when irrigated with three irrigation intervals including sowing irrigation. However, the finest fibers were recorded for the Iriana variety when irrigated by applying three irrigation intervals including sowing irrigation.