In order to study the effects of drought stress and planting density on quantity and morphological characteristics of chicory (Cichorium intybus L.), this experiment was conducted at Iran in 2006. Field experiment was carried out by a split plot design with 4 replications. The factors which studied included irrigations according (50 (without drought stress), 100 (mild drought stress) and 150 (high drought stress) mm water evaporation from evaporation pan) and planting densities (6, 9, 12 and 15 plant/m^2). The results showed that drought stress had significant effect on biological yield, lateral stem number, leaf number and pod number and plant height had not significantly affected due to drought stress. Means compression showed that highest biological yield, lateral stem number, plant height, leaf number and pod number were achieved under without drought stress. Also planting density had significant effect on lateral stem number, leaf number and pod number and biological yield and plant height had not significantly affected due to planting density. Means compression showed that highest biological yield and plant height were achieved under 15 plant/m^2 and highest lateral stem number, pod number and leaf number were achieved under 6 plant/m^2. The results of this experiment showed that drought stress and planting density are important effective factors on quantity and morphological characteristics of plants that they can affect on quantity yield of chicory sorely.