An importance of SMEs roles in country development is widely accepted nowadays. Acs and Davis (1987) distinguishes four consequences of the increases importance of SMEs as 1) a vehicle for entrepreneurship, 2) route for innovation, 3) Industry dynamics, and 4) job generation. Other research suggested that SMEs are the major providers of new jobs and contribute positively to economic growth, although GDP growth is influence by many more factors (Audretsch et al, 2008). In developing country like Thailand the numbers of SMEs were accounted for 99.7% and 99.5% of total enterprises in 2006 and 2010 respectively. These SMEs’ products and services took parts of GDP contribution as 38.8% in 2010 and 38.1% in 2008. Thus, we may judge that SMEs are not only trading, production, and service large bases but also huge jobs and labors market. In 2010, Thai SMEs took the part of 60.7% of total jobs employment in Thailand.