Six concentrations of Paclobutrazol (PP₃₃₃) were experimented (0, 10, 30, 60, 90, 120 ppm) as foliar spray on three years old Crimson seedless grape vines grown in private orchard at El Qattah, Giza Governorate, Egypt to find out its influence on yield and a fruit quality. The mentioned treatments were conducted at veraison stage in compare to the traditional treatment with Ethrel. The cluster weight, total yield/vine, 100 berries weight, berry firmness, total acidity, TSS, TSS/acid ratio and total anthocyanine content were measured. The results referred to an ascending increase in anthocyanine content and a reduction in acidity % went in parallel to Paclobutrazol concentrations increase. Spraying of 10 ppm of PP₃₃₃ led to a significant increase in berry weight whereas120 ppm concentration achieved the highest TSS/acid ratio.