The changing of Asian immigrant workers, such as, Burmese, Lao, and Cambodian who are hard working in Thailand, is rapid. It leads to poor mental health which increases a need for public health administration because accessing mental health information after ASEAN community’s policy is difficulties and burden. The objective of this study was to analyze a path model of mental health service utilization among Asian immigrant workers after ASEAN community’s policy. This methodology was used by a cross-sectional survey with Asian immigrant workers such as, Burmese, Lao, and Cambodian in 2017. Instruments used general characteristics, public health administration, the need for mental health care, and mental health status related into mental health service utilization. A path model for mental health service utilization among Asian immigrant workers were analyzed by using path model. Results from this study showed that every causal factor had a direct effect on mental health service utilization. But public health administration among this groups following the ASEAN community policy had the most direct effect on mental health service utilization. Its standardized regression weight of 0.479 (p-value < 0.01). R square of mental health service utilization was 0.308. This study displayed that public health administration was the most important factor associated with mental health service utilization among Asian immigrant workers following the ASEAN community policy. This recommendation should be using qualitative methods for the next study among Asian immigrant workers.