Gravity model of trade was applied to the European Union with main focus on Poland and its major trading partners. The trade data was analyzed and the effect of common market was measured. The final conclusion of this research shows how accession to the European Union reflected on Poland’s trade. A total of 189 observations were collected from the secondary sources mostly from official government publications. Data series range from 1989 until 2009 which gives 21 records. Countries which this research focuses on include 3 countries, which joined European Union prior to 2004: Germany, France, and Italy. Another 3 countries joining the common market together with Poland in 2004: Czech Republic, Hungary, and Slovakia. The last 3 countries are those which remain outside of the European Union: Russian Federation, Ukraine, and Turkey. Countries were selected based on the total trade volume with Poland. Every record for the given country in a given year contains imports to Poland, exports from Poland, GDP, and the population. The results of this research show how the trade patterns among Poland and its major trading partners have changed due to the accession to the European Union. This research contributes to the existing research on the effect of the trade creation with the well-presented and supported case of Poland.

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