This paper explores the relationship between spiritual intelligence and the mental well-being of temporary migrant workers in Australia. Data were collected from 443 temporary migrants in Australia working in different organisations. Analysis using Structural Equation Modelling indicates that temporary migrant workers with a higher level of spiritual intelligence are likelier to have better mental well-being. The study also reveals that spiritual well-being mediates the relationship between spiritual intelligence and mental well-being. These findings shed light on the importance of spiritual intelligence and spiritual well-being in the mental well-being of temporary migrant workers.