The 2005 ECM Prague Open was a professional tennis tournament played on clay courts at the I. Czech Lawn Tennis Club in Prague, Czech Republic from in mid-May, 2005.

It was the 14th edition of the men's tournament which was part of the 2005 ATP Challenger Series[1] and the 4th edition of the women's tournament which was part of the 2005 WTA Tour as a Tier IV tournament.

[2][3] Note: this information was only available for the women's tournament * per team Jan Hernych defeated Jiří Vaněk, 3–6, 6–4, 6–3 Dinara Safina defeated Zuzana Ondrášková, 7–6(7–2), 6–3 Jordan Kerr / Sebastián Prieto defeated Travis Parrott / Rogier Wassen 6–4, 6–3 Émilie Loit / Nicole Pratt defeated Jelena Kostanić / Barbora Strýcová, 6–7(6–8), 6–4, 6–4