The purpose of this study is to analyze how threats the security of the Baltic states have been perceived in Sweden between 2001 and 2013. The purpose is also to study how the Baltic states membership in Nato hav been perceived to affect the general security environment of Sweden. The widened definition of what constitutes threats to international security of the Copenhagen school is used to analyze how the threats to the baltic states change in the time period as perceived by Sweden. In order to accomplish this key documents regarding how Sweden perceives the international security environment is studied. The result is that the Swedish view on the security of the Baltic states during the period has changed from being dominated by military threats to threats such as organized crime and corruption and then back to military threats again. The Swedish view on Nato-Membership for the Baltic states has changed from being ambivalent to being positive.