Objectives: The aim of this study was to survey relationship between religious orientation and happiness in elderly man and woman in Tehran.

Methods & Materials: The present study was descriptive and causal- Comparative. In order to survey the relationship between religious orientation and happiness among the elderly men and women in Tehran 389 aged people above 60 years including 247 men and 142 women were selected by multi stage cluster sampling. The research instruments were Allport religion orientation questionnaire and happiness inventory of Oxford.

Results: The result showed that religion orientation and happiness in elderly man and woman (P<0/01) have significant positive relationship. The amount of happiness among these who had religion internal orientation were further that who had external religions orientation (P<0.01). The relationship between religion external orientation and happiness in both elderly men and women was not significant. The amount of happiness among old women was significantly further that old men (P<0.01). The elderly woman in two internal and external religion orientation in general earn higher markers than elderly men (P<0.01).

Conclusion: The result shows that there is positive relationship between religion orientation and happiness among elderly men and women. We conclude that people with internal religion orientation were happier in both genders. On the confirm of most studies in the field of religion psychology we could conclude that the elderly women are more religious than elderly men. More research in the field of studied varieties can represent brighter data.