The effects happiness has in the work environment for increasing the effectiveness and efficiency of the employees necessitate the studying and investigating of the concept of happiness in various organizations. Therefore, the current study tries to propose and explain a happiness model in the organization based on national culture. This study has been carried out using a combinatory method and in two sections; namely, the qualitative and the quantitative parts. In the qualitative section, we interviewed experts and university specialists, selected using targeted sampling method, to carry out the identification and classification. In the quantitative section of the study, we utilized the descriptive-survey method and the data gathering tool made by the researcher to elicit the views and opinions of 383 employees of Tehran Municipality, which had been selected using simple random sampling method. Then, we used Pearson’s correlation coefficient and confirmatory factor analysis to analyze the obtained data. The findings show that physical, psychological, spiritual, and social components are among the personal aspects of happiness based on national culture and components such as coherence and sociability are among the organizational aspects of happiness based on national culture.