Play is a universal behavior in children. Play has the power not only to facilitate normal development but also to alleviate abnormal behavior. That is, play has curative effects on children. The purpose of the present paper is to discuss the therapeutic factors of child`s play. The therapeutic factors discussed in this paper were as follows. First, play is the best way of establishing a therapeutic alliance with a child as it is interesting, enjoyable, and natural for children. Second, play is the most natural medium for self-expression for a child; it is what verbalization is to the adult. Third, play is a self-motivated activity that satisfies a child`s innate need to explore and master his environment. Successful experiences in play activity contribute to the enhancement of a child`s self esteem. Fourth, in the play process, children can easily release intense feelings of anger, grief, or anxiety that had been difficult to express before. Fifth, play enhances the flexible and varied use of a child`s imaginative capacities. The world of imag-ination - or `pretending` - gives a child power over the world, even when it does not have much control in real life. Imagination can also help a child overcome impulsiveness, poor planning, and lack of confidence. Sixth, the most apparent and fundamental aspect of play is that children enjoy it. Children play just because it is fun. Enjoyment, and the positive a emotion of play contribute to not only a sense of happiness or well-being but is also a powerful antidote to the stress of living.