The magnetic fields are one of the effective environmental factors on biological phenomena in living organisms especially plants. Artichoke (Cynara scolymus L.) is a medicinal plant that plays a good role in blood cholesterol reduction and liver disorders, this study has performed to investigate the effectiveness of magnetic water on growth, fresh and dry weight of leaf and root, efficiency of the water consuming and some chemical compounds of Artichoke plant in 2012. Experimental treatments include of four levels of electromagnetic field intensity (Zero, 3000, 6000 and 10000 Gauss) as a complete randomized design with four replications. Analysis of variance of data revealed that plant growth, shoot weight, root weight and efficiency of water consuming and chemical compounds were significantly influenced by irrigation with magnified water. The highest Phenol and Antioxidant activity of plant extract was observed in samples which were irrigated with water in which magnified with 6000G magnetic field with 3.99 mg/g and 66.74%, respectively. Contrast to that the highest amount of chlorogenic acid (0.20 mg/g) was observed in samples which were irrigated using top water. Based on the obtained results Therefore, it is concluded this level (6000G) of intensity has better effectiveness in comparison to other level on quality of Irrigation water and could increase quality Artichoke plant.