This study tried to understand conscientizing process of unconsciousness by case analysis of sandtray therapy cases of homeless child. Participants of this study are 10-year-old male child who had ever been homeless. This study, with point of view of phenomenology, tried to observe and describe works in sandtray therapy ‘as it is’, and also during the process of sandtray therapies, a researcher conducted direct observation and in-depth interview about experiencing sandtray therapy. According to changes of contents and topic shown during the process of sandtray therapies, this study analyzed contents of sandtray therapy by classifying the process into the early stage, the medium stage, and the late stage. According to sandtray therapy of the targets of this study, chaos and confusion like not being goal-oriented and able to adapting to reality emerged because of unbalance of ego at the early stage. In the middle stage, through scenes of trials and practices, power and dynamics that can control one’s body and emotion also emerged. At the late stage of sandtray therapy, although struggle of opposing poles had continued; topic of contents had been moderated to cooperatable game and transformation and metamorphosis emerged. The main results of this study are as follows: First, the sandtray therapy process of the homeless child could be seen as a struggle for establishing his own existence and controlling himself. Second, solving the challenges the child must overcome through the work of reconstructing, conscientizing and transforming his unconscious inner side in the sandtray therapy process, they showed a new direction in life and efforts to adapt to everyday life. This study is of significance in that it helped understand the process of mental change of child by suggesting the consciousness process of unconsciousness through the case analysis of the sandtray therapy.