The mobile device users have been increasing significantly because of the development of social network system. Mobile educational serious games are occupying a large portion of the serious game market but there is a lack of the quality evaluation elements for providing useful quality evaluation information about educational serious game to user or developer. This study conducted prioritizing the quality elements of mobile educational serious game contents. Then, these elements are decomposed into sub-elements and resulted into a hierarchical model with three levels. To evaluate the priorities among elements, AHP(Analytic Hierarchy Process) is adopted. Additionally, if the evaluation element of this study would be applied into other game contents, it can provide the fundamental information for quality improvement of total mobile educational serious game contents.