Introduction Nowadays, EQ is of a high importance in the different aspects of people’s life. Specifically 80 percent of people's success in different stages of their life is related to their EQ and only 20% is related to their IQ. Marriage happiness, which could be affected by EQ, is a very important factor in this issue. Hence, this survey aims at the relation between EQ and marriage happiness. Methods The method used in this survey is descriptive-analytic. All the 41 married couples in kashan city make the statistical population. Based on Morgan and Grajes table, 388 people were randomly selected using cluster sampling. Data were collected using two types of questionnaire, Shring’s EQ questionnaire and Inrich’s marriage happiness questionnaire. Descriptive and deductive statistics, such as Pearson correlation coefficient, were used for data analysis. Results In this survey, 63.5% of subjects were female and 36.5% were male. Subjects’ level of education was from lower than diploma to higher than masters, of which, 50.5% had diploma or lower degrees. 49.5% were self-employed. 43.6% were between 25 to 35 years old (the go up with the highest frequency). 61.6% have been married during the past 10 years. The results show that there is a meaningful relation between EQ and marriage happiness. There also exist a meaningful relation between the components of EQ (empathy, understanding emotions, self-control and social skills) and marriage happiness (P=0.01). In some cases, there was meaningful relation between demographic variables and EQ and marriage happiness, too. Conclusion Since there exist meaningful relation between EQ and marriage happiness and some other variables, therefore, EQ improves and energizes family relations and is considered as an important factor. Therefore improving young peoples’ EQ, by training them, will improve their personal relationships and later will result in a happy marriage. Keywords: EQ, marriage happiness, married
