| 2023 Curitiba Challenger | |
|---|---|
| Date | 23 – 29 October |
| Edition | 2nd |
| Surface | Clay |
| Location | Curitiba, Brazil |
| Champions | |
| Singles | |
 Hugo Dellien | |
| Doubles | |
 Guido Andreozzi /  Ignacio Carou | |
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.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ARG | Juan Manuel Cerúndolo | 99 | 1 |
| ARG | Thiago Agustín Tirante | 111 | 2 |
| ARG | Francisco Comesaña | 117 | 3 |
 CZE | Vít Kopřiva | 122 | 4 |
| BOL | Hugo Dellien | 129 | 5 |
 BRA | Felipe Meligeni Alves | 142 | 6 |
| ARG | |||
| ARG | Camilo Ugo Carabelli | 148 | 8 |
 ITA | Luciano Darderi | 157 | 9 |
The following players received wildcards into the singles main draw:
Gustavo Ribeiro de Almeida Wilson Leite Orlando Luz The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Mateus Alves Pedro Boscardin Dias Daniel Dutra da Silva 
Arklon Huertas del Pino Gilbert Klier Júnior Nicolas Zanellato Hugo Dellien def. 
Oliver Crawford 7–6(8–6), 4–6, 7–6(7–1). Guido Andreozzi / Ignacio Carou def. 
Diego Hidalgo / 
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