Lisianthus is one of the popular ten cut flowers in the world. One of the major problems in raising lisianthus is a decrease in production, flower quality and vase life. In order to decrease this problem, lisianthus flower growers usually use high concentrations of nutrient solutions. Calcium is one of the essential and important nutreintss. However its absorbtion is not appropriate enough and sometimes movement faces abstain according to special conditions in the greenhouse and lack of plant trairation. The quality of product normaly decline following the insuffication calcium in plant. So the present study were conducted to study the effect of calcium amino chelates in comparission with calcium chloride on calcium absorbtion, flower production and quality and postharvest life of lisianthus "cinderella double lime" at Isfahan University of Technology. Treatments were calcium chlorid (290 mg/l), calcium amino chelates (lysine, threonine and methionine) the amino acids (1%) and control with three replications based on a complete block randomized design. Physiological carcteristics including calcium content, carbohydrate content, total nitrogen (N), total protein of flowering stem, greenness index and leaf gas transaetions. In the some way morphological factors including flower number and diameter, flowering stem number, length, diameter, dry and fresh weight recorded meanwhile the experiment. For conducting postharvest experiment the flower stems kept and containers containing 500 ml distilled water at 26±2 0 c and relative humidity at 60±5% and photoperiod of 16:8 day/night. Then after vase life and fresh weight reduction recorded daily. The results showed that drenching plants with calcium amino chelates (1%) presented significant difference with amino acid and control, however showed no significant difference with calcium chloride. calcium amino chelates significantly influenced total carbohydrate content compared to the control, however showed no significant difference with other treatments. Similary, calcium amino chelates did not affect nitrogen content, total protein content and leaf greening index and leaf gas exchange transaetions. Methionine amino chelate treatment recorded the most flower number, however methionine amino acid did not improve flower diameter as much as calcium amino chelate treatments. Calcium amino chelate improved flower stem dry and fresh weight compared to calcium chloride. Regarding postharvest life calcium amino chelate treatment enhanced vase life. Lysine amino chelate improved this factor by 6.39 days compared to control. In the same way calcium amino chelate especialy lysine amino chelate harvested flowers showed the lowest decrease in fresh weight promosing an effective method to keep postharvest life of lisianthus. To sum up, regarding the enhancive effects of lysine amino chelate on the plant qualitative characterstics, applying this compound is for growing lisianthus cut flower. Keywords: calcium amino chelate, calcium chloride, calcium content, quality of the flowers, vase life, the number of flowers.