Chicory, is a medicinal plant that the most important use is through the production of leaves and roots. In this research, the effect of the different concentration of Pb(NO3)2 on some morphology traits of chicory were evaluated in the aeroponic system. This system is a suitable method for investigating the effects of heavy metals in controlled conditions. The treatments were including Pb(NO3)2 (0, 50, 100 and 200 mg l-1).This study conducted based on the completely randomized design with 5 replications. The results of ANOVA indicated that the effects of treatment were significant for plant height, root length, number and area of leaves, fresh and dry weights of the shoot and root. The results showed that 200 mg l-1of Pb(NO3)2 resulted in the lowest plant height, root length, dry weights of root and shoot and number and area of leaves. The control produced the highest plant height, root length, dry weights of root and shoot, number and area of leaves.
