Title: Research on middle-age worker¡¦s stressors and withdrawal behaviors Student: Tzu Hui Liao Advisor: Jin Feng Uen By the trend of decreasing baby-bust and early-retirement, the labor force structure has changed. Middle age and older workers will become increasingly prevalent in the work place. The impact of an aging workforce raises the height-light issues facing employees today. During the global economic crisis in 2008, there are many business enterprises chose to lay off employees massively or offer unpaid leaves. And the middle age and older workers are the main target. Thus, this worker issue has become more and more important. Attention is mainly given to the human resource policies which may impact middle age workers such as performance management, selection and training etc. Less research has focused on attitudes toward the elderly held by middle-aged adults themselves. The presence of ageism in our society is of mounting concern with regard to the changing demographic shape of the workforce. Governments and organizations have become interested in the middle-age worker on performance, training, in recent years. Middle-age worker has numerous life and working experiences, so their mental and physical attitudes may vary form the ones held by the freshmen in labor market. Therefore, this research aims to explore on middle-age workers and withdrawal behaviors in depth in order to development the best human resource practices.