The 2023 Curitiba Challenger was a professional tennis tournament played on clay courts.

It was the second edition of the tournament which was part of the 2023 ATP Challenger Tour.

It took place in Curitiba, Brazil between 23 and 29 October 2023.

The following players received wildcards into the singles main draw: The following player received entry into the singles main draw as an alternate: The following players received entry from the qualifying draw: