This research was carried out for two seasons (2022 and 2023) in a private vineyard located at El-Khatatba, Monoufiya governorate. Ten years old Crimson Seedless grapevines supported by Gable trellis system, irrigated with drip irrigation were used for this investigation. All vines were cane pruned. Three levels of canopy density were used: the low canopy density (vines were pruned to 8 canes x 8 buds/vine + summer pruning), the moderate canopy density (vines were pruned to 12 canes x 10 buds/vine + summer pruning) and the high canopy density represented as control treatment (vines were pruned to 14 canes x 14 buds/vine + without summer pruning). The results revealed that a higher percentage of gaps, light intensity, aeration and moderate leaf area were recorded at the low canopy density (8 canes x 8 buds/vine + summer pruning). Moreover, the treatment of 8 canes x 8 buds/vine + summer pruning significantly increased the total yield/vine, bunch weight, TSS% and total anthocyanin in berry skin as well as reduced pruning weight and total acidity as compared to the treatment of 12 canes x 10buds/vine + summer pruning and control treatment. Economically, this treatment could be of good return for growers.