In this study, the energy and economic analysis of irrigated lentil production was done through investigation of different energetic and econometric indices. The required data were collected randomly by questionnaire method from 50 sesame farms in Mazandaran province of Iran. Chemical fertilizers and pesticides had the highest and lowest contribution on energy input equivalents, respectively. The values of energetic indices energy ratio, energy productivity, specific energy and net energy gain of sesame production were calculated as 1.81, 0.07 kg/ MJ, 13.80 MJ/kg, and 19949/34 MJ/ha, respectively. Econometric indices net return, gross return, economical productivity and benefit to cost ratio were obtained as 18925718 Rials/ha, 30020718 Rials/ha, 0.037 kg/1000 Rials and 1.51,respectively.