The aim of the current research is to reveal the causal model of the relationship between existential fulfillment, job burnout, and bullying in the work environment among teachers. To achieve this aim, the research was applied to a sample of (693) teachers in the Sharkia and Dakahlia governorates their chronological ages ranged between (27- 50) years, with (Mean=38,5, SD= 1.9) and after applying the scale of both (existential fulfillment, job burnout, and bullying in the work environment) (prepared by the researcher) The results showed a statistically significant negative correlation at (0.01) between existential fulfillment and job burnout, a statistically significant negative correlation at (0.01) between existential fulfillment and bullying in the work environment, a statistically significant positive correlation at (0.01) between Job burnout and bullying in the work environment, and there is a statistically significant effect of teaching experience, while there is no statistically significant effect for both gender and specialization on the degrees of existential fulfillment as a whole. There is no statistically significant effect for gender, specialization, and teaching experience on the degrees of job burnout as a whole. There was a statistically significant effect for gender, while there is no statistically significant effect for both experience and specialization on the degrees of bullying in the work environment as a whole. There was a statistically significant positive direct effect at (0.01) between job burnout and bullying in the work environment, there isn’t an indirect effect between existential fulfillment as an independent variable and bullying in the work environment as a dependent variable through job burnout as an intermediary variable, and the research variables form a causal model that explains the relationship between them.