The research aim to assess the level of competition on the market supply and sales, and the trend observed in the phenomenon of competition in the market. Information was obtained on the basis of the opinion of entrepreneurs selected companies located in rural areas southwestern borderland Polish. Research was conducted in 2011 among 127 businesses operating in selected municipalities borderland. Studies have shown the average intensified competition had the in the market supply and sales in the opinion of half of entrepreneurs, and a one quarter of the population phenomenon assessed as the large. Whereas the tendency of changes in the phenomenon of competition is increasing in the market the supply according to one quarter of respondents, and on the selling market in assessing more than one third of total respondents borderland. More than half of the entrepreneurs did not see significant changes in this regard.