The main purpose of this study was to analyze the content of elementary education textbooks based on happiness components including positive emotion and life satisfaction. The research population included all of the elementary education textbooks, consisting of 37 textbooks in academic year 1389-1390 on eight topics, including Farsi (Let’s Read), Farsi (Let’s Write), science, Heaven Gifts, Heaven Gifts (homework), Koran, math and social education.The research sample included textbooks on seven topics Farsi (Let’s Read), Farsi (Let’s Write), science, Heaven Gifts, Heaven Gifts (homework), Koran, and social education. The theoretical framework of the study has been Argil, Martin & Lu theoretical viewpoint and related components. The content analysis method of present study was Shannon Entropy Method and unit of analysis was pages (of text, questions, practices and pictures). Furthermore, for completing information, qualitative method of data collection i.e., interview with students has also been used. The results showed that positive emotion component has been considered more than satisfaction component. Meanwhile, each of the indexes of mentioned components was not considered in a balanced way and textbooks have not covered the components of happiness with the same proportion. Also, the results of interview showed that students are satisfied and happy with the content of textbooks (value, structural, emotional and interest categories). However, students felt more happy with Farsi (Let’s Read) textbook than other textbooks.