Iran is suitable for mass production of ornamental plants including cut flowers due to its geographical location and having good weather and being close to consumer markets, in particular Persian Gulf countries. Gerbera is one of the 10 commercial cut flowers in the world and is ranked fourth among cut flowers. One of the main problems after harvest for this cut flower is short post-harvest life due to wilt and its breaking neck. Two major factors in the loss of cut flowers are the lack of water balance and vascular blockage. The aim of this study was to compare the effect of ajowan and thyme essential oils with chemical 8- Hydroxyquinoline sulfate on the quality and vase life Gerbera cut flowers. For this purpose, cut flowers were placed first in 3% sucrose solution for 24 hours. Then 8- Hydroxyquinoline sulfate preservative solution at concentrations of 10, 20 and 40 mg per liter and Ajowan and thyme essential oils with concentrations of 250, 500, 750 and 1000 milligrams per liter were compared at 20 ° C and relative humidity 60± 5 percent and was measured some physicochemical properties of the Flowers. This experiment was conducted as factorial in a completely randomized design with three replications. The results showed significant effectiveness of treatments 8- Hydroxyquinoline sulfate and ajowan and thyme essential oils on qualities of anthocyanin, the relative fresh weight, percent water flowers, uptake solution, Vase life and preservative solution pH. In addition, the results showed that 500 milligrams per liter for ajowan and 20 milligrams per liter 8- Hydroxyquinoline sulfate treatments improved physicochemical properties and respectively 6 and 4 days increased the vase life of cut flowers gerbera compared to control treatment. It also showed that the concentrations of 1,000 mg per liter ajowan and thyme essential oils has led to toxicity and reduced vase life of cut flowers for gerbera. Keywords : Gerbera cut flowers, essential oil of thyme, essential oil of ajowan, 8- Hydroxyquinoline Sulfate, vase life