The major functions of the digital textbooks that have been developed recently were focused on electronic whiteboard, learning tools, multimedia. But supporting contents retrieval was not included yet. This study is aimed to develop an elementary digital textbook that supports retrieval function. We surveyed elementary teachers about the requirements for search function and a digital textbook was designed and implemented based on the result of the survey. The distinctive feature of the developed digital textbook, which is written in XML, is that it is enabled to search the units of meaningful phrases. The survey which was carried out after using the new digital textbook showed that more than 90% of the teachers think that it is quite useful in class and they would like to use this textbook in their class. If a retrieval function can be added to the digital textbook which is going to be supplied to elementary schools, it will be a lot helpful for teaching and learning procedure.