Abstract: This paper is an analysis of the cultural and traditional factors that the author presents as essential considerations in the treatment of Samoan people who have been diagnosed with a mental illness. Just as important to any clinical diagnosis, is the spiritual nature of Samoan culture and traditions, which inform belief systems. A full understanding of these will explain how the traditional beliefs and cultural values of Samoan people have an impact on their perception of mental illness, its causes and cures. The thesis places emphasis on 'ma'i -aitu', the Samoan term for most ailments pertaining to the mind or psyche. The focus is on defining 'ma'i -aitu' as part of a Samoan world view and likewise a description of a similar type of manifestation in the Papalagi (western) context of a psychiatric disorder and how treatment and management is usually undertaken. The issues addressed in this paper aim to highlight the Samoan client's world view from a Samoan perspective of mental illness which then poses the question of how they can be managed holistically and appropriately under the Papalagi medical system. Furthermore, it questions if the traditional belief system of Samoans run deeper than originally thought and can the replacement thereof by a foreign culture be responsible for the increased mental problems in Samoans living in New Zealand? This paper emphasises the importance of integrating the western medical model and Samoan health models, for appropriate mental health service delivery to Samoan people.