INTRODUCTION: The most important, useful, and cost-effective way to attain organizational goals is the improvement of intergenerational-interpersonal communication among different generations of employees in the workplace. Therefore, the present study aimed to assess the role of intergenerational-interpersonal communication in the performance of 50s-70s-generation employees of the Red Crescent Society of Tehran (age range of 20-40 years) in 2019. METHODS: This applied research was conducted based on a descriptive-survey design. The statistical population of this study includes all employees of the Red Crescent Society of Tehran province (n=160). The participants were selected via the census method. A researcher-made questionnaire was employed to collect data, and SPSS software (version 24) was used for data analysis. FINDINGS: Based on the results, the variables and dimensions of intergenerational-interpersonal communication were significantly and strongly correlated with the performance of 50s-70s-generation employees of the Red Crescent Society of Tehran province. In other words, the employees' performance will be enhanced with an improvement in the dimensions of intergenerational-interpersonal communication. CONCLUSION: As evidenced by the obtained results, effective intergenerational-interpersonal communication skills training should be considered one of the goals of stakeholders. Moreover, groupism and relationship solidarity are among the effective factors influencing employee performance. This solidarity can be significantly improved by the establishment of intimate relationships, membership in groups, interaction, face-to-face communication, social status, appropriate expectations, necessary trust, participation in decision-making, and managers' acceptance of individual differences.
