Effects of accession of Serbia to European Union on the level of prices in the context of their harmonizing in European economic market space have been discussed in this article. Assessment of the effects has been done on the base of experience gained by EU member countries. Experience from the countries became EU member show Serbia has to be faced with restricted convergent ion pressures on prices level. In the case of the accession to EU with current level of prices and income(s) Serbia could record certain (annual) rise of the prices higher than rise of prices in EU zone. Assessment of further moves of the prices of basic products shown that significant rise of leaving product (food, non-alcoholic drinks, clothes and shoes) prices could be expected in Serbia because these prices are at the level similar to those in EU. Pressures on rise of prices shall be done at the prices of electric (and other) energy because of effects of substitution, but also on services (education, recreation, culture, housing). Having in mind Serbia facing with pay balance deficit for longer period of time, it could have effects on the level of prices of excise goods and other categories of goods in the regime of administrative control that are for state fiscal incomes.