In this study, drought period when important agronomic characters of sesame plant is critical, was examined at different growth stages. Plant death by drought started at 40 days after drought in vegetative growth stage and 20 days, in reproductive growth stage. Obserbed by growth stage, drought damage in reproductive growth stage was more in jurious than vegetative growth stage. All the important agronomic characters was refreshed until 40 days and 20 days after drought in vegetative growth stage and reproductive growth stage respectively, but it could berefreshed after those times. Decrease rate of yield by drought ranged from 29 to 80% in vegetative growth stage and from 49 to 85% in respective growth stage. All the important agronomic characters except rate of ripeness showed positive association with grain yield under drought condition. Oil content in grain was decreaced by drought but composition of fatty acid was not affected by it.