By using a structured questionaire, 194 public nurses, 104 local policemen, 180 neighborhood workers, and 175 families of the mentally ill were surveyedfor their attitudes toward compulsory assessment and involuntary admission listed inthe Mental Health Act which was enacted in 1990. Data were collected through mailfor the former three groups while the later group was interviewed. There was no significant difference of attitude toward involuntary admission amongvarious groups. They all agreed that medical expenses should be subsidized by government and acquisition of psychiatric knowledge was important. Besides, they held positive attitude toward the guardian who were supposed to be responsible for the care ofthe psychiatric patient. However, for community safety reason the subject tended toagree with longer stay of the patient in the hospital. Based on the findings, public education on mental health act either to the families of the mentlly ill or even to the mental health related workers is urgent.