This study examines internal labour migration in Thailand to study the stress level of workers who have to care of and look after their ageing parents. A cross-sectional survey was administered to 300 Thai migrant labourers who continuously have to attend to their ageing parents. Thai Job Content Questionnaire (Thai-JCQ) was used to gather information on job stress level using the Job Demand Control (JDC) model developed by Karasek. Findings show that distance, wages, and working conditions have a direct effect on job stress. Wages had the most direct relationship with job stress with a standardised regression weight of 0.400 (p-value<0.01). In conclusion, distance, wages, and working conditions, each directly impacts job stress. However, caring for ageing parents is a mediator and a moderator of job stress levels.