The Czech Republic and Slovakia are both countries in the Central Europe, which share not only common history and geographical location, but also similar economic development. Moreover, both of them entered the European Union in the same year and both of them are members of Visegrad Four, but despite these similarities there exists one significant difference in modern history of these countries. Slovakia has been using Euro as currency since 2009, while in the Czech Republic is still used Czech crown. Foreign trade plays important role in the economy of every country, especially in modern globalized world; it solves the proportionality problem, builds the demonstrative effect, but most of all, it supports economic development (in theoretical point of view, foreign trade is part of the Gross Domestic Product formula). This article deals with selected topics of foreign trade in both analysed countries, namely in the Czech Republic and Slovakia. The aim of the article is to compare the development of foreign trade in the country with Euro and without Euro. Special attention is paid on the situation in the Czech Republic, where Czech National Bank intervened on the exchange rate between the Czech crown and Euro for several months with the aim to support the export of the Czech Republic. Despite these interventions, the development of the export of the Czech Republic is not stable, as well as the development of the export of Slovakia. Brief results are described in this article.