This study is a requested case study on an elementary school student who has not been able to adapt to their daily school lives. The student has shown attention deficit, distraction, slow rate of understanding, inadequate sociability, and separation anxiety. Sand Tray Therapy based on a conclusion that the student is experiencing an early stage of unstable attachment was implemented. During the therapy sessions, the student was able to strengthen his ego through repetition of learning process of nurturing and constructing, and releasing his fear and conflict by expressing in the sand box, which also provides a sense of a free, protected environment. Consequently as a result, the student was able to show less school maladjustment in including significantly decreased attention deficit, increase the attention level in his study, and even going on a camp trip separated from his mother.