The 2005 Banka Koper Slovenia Open was a women's tennis tournament played on outdoor hard courts.

It was the inaugural edition of the Slovenia Open, and was part of the WTA Tier IV tournaments of the 2005 women's professional tennis season.

It was held in Portorož, Slovenia, in mid-September, 2006.

[1][2] * per team Klára Koukalová defeated Katarina Srebotnik, 6–2, 4–6, 6–3 Anabel Medina Garrigues / Roberta Vinci claimed the title, when Jelena Kostanić / Katarina Srebotnik, 6–4, 5–7, 6–2