The current research aims to identify the mediating role of digital emotional contagion in explaining the relationship between emotion regulation and social anxiety among postgraduate students. The research was conducted on a sample of (305) postgraduate students in the various departments of the faculty of education, Zagazig Univesity (50 males, 255 females), their aged ranged between (27- 54) years, with an average age of (30.64), and a standard deviation of (5.396). After applying the measure of digital emotional contagion, emotion regulation and social anxiety (Prepared by the researcher), the results showed a good match between the data of research sample and path analysis model between emotion regulation, positive and negative digital emotional contagion, and social anxiety, there is a statistically significant direct effect between emotion regulation and positive and negative digital emotional contagion, there is a statistically significant direct effect between positive and negative digital emotional contagion and social anxiety, and there is a statistically significant direct effect between emotion regulation and social anxiety, and there is a statistically significant indirect effect between emotion regulation as an independent variable and social anxiety as a dependent variable through positive and negative digital emotional contagion as an intervening variable.