The 2005 PTT Bangkok Open was a women's professional tennis tournament played on outdoor hard courts.

It was the 1st edition of the PTT Bangkok Open and was part of the WTA Tier III tournaments on the 2005 WTA Tour.

It took place at the Rama Gardens Hotel in Bangkok, Thailand from October 10 through October 16, 2005.

The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following players received entry as a lucky loser: The following pair received wildcards into the doubles main draw: The following pair received entry from the qualifying draw: It was the 5th title for Vaidišová in her career and the 3rd consecutive title in 3 straight weeks, after winning in Seoul and Tokyo.

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