The authors present the Poststructuralist Model, the therapeutic model integrated with MRI and Milwaukee Brief Therapy and White/Epston's Narrative Model. The Poststructuralist Model doesn't estimate the pathological structure underneath the problem (e. g. unconsciousness or pathological family system), but focuses the present human interactions. The Poststructuralist Model in the context of child psychotherapy is characterized of 4 steps: 1) decision of the complainant(s) by asking the kid “do you have any problem?” [If the answer is “no”, other member(s) of his family will be examined.], 2) decision of the problem by asking the complainant(s) “what is your problem?”, then two alternatives are prepared. The first is the problem-focused course, and the second is the solution-focused one: 3a) decision of the attempted solution, 4a) prescription of 180° reverse behavior, on the other hand, 3b) looking for the exceptions or Unique Outcome, 4b) re-authoring questions.

　　With introducing the cases of Trichotillomania and Alopecia areata, the therapeutic process, especially concerning how to decide the chief complaint and therapeutic goal, is disclosed.

　　In discussion we closely examine the step 1) and 2), and emphasize the importance of adequate intervention making just small change.