A case of school phobia in an eight-year-old boy is presented. The hypothesis was made that the symptom reflected a disequilibrium of the family interrelationships. Family therapy on a once-a-week basis was instituted and involved the entire family. Occasional individual sessions were added when requested. Sound films were made of the first four interviews and one after eighteen months of therapy. The key factor resulting in the change of the family dynamics was a myocardial infarction of the mother. The phobic boy had to stay home then to protect her magically from death and its consequences to him. A good result was obtained.