Seppo Arimo Kääriäinen (born 28 March 1948 in Iisalmen maalaiskunta) is a Finnish politician of the Centre Party and Doctor in Social Sciences. He served as the Minister of Defence of Finland between 2004-2007. He has been MP since 1987 and was Minister of Trade and Industry and Minister at the Ministry of Foreign Affairs in 1993-1995. He has been the First Deputy Speaker of the Parliament of Finland.