In this study, job mobility refers to situations wherein Chinese migrant construction workers frequently change employers, plausibly a principal cause of quality defects, work-safety hazards and poor performance, within the construction-business reality. The study examines job mobility in terms of migrant construction worker willingness to change employers. Gleaned from a field survey and by using a logistic-regression model, a total of 531 questionnaires are assessed, revealing how work tenure, education, daily wages, job-hunting channels, number of workmates, and employment contracts might relate to construction worker alacrity to change jobs. Daily wages and work tenure appear to make the greatest contribution to migrant worker willingness to change jobs, while the effects of employment contract and education seem to be minimal. Despite its limitations, the study offers future research directions and policymaking recommendations toward relieving the informal termination of migrant construction workers in China.