The 2018 Copa CONMEBOL Sudamericana was the 17th edition of the CONMEBOL Sudamericana (also referred to as the Copa Sudamericana, or ), South America's secondary club football tournament organized by CONMEBOL.
Brazilian club Atlético Paranaense defeated Colombian club Junior by 4âÂÂ3 on penalties in the finals after a 2âÂÂ2 draw on aggregate score to win their first tournament title. As champions, Atlético Paranaense earned the right to play against the winners of the 2018 Copa Libertadores in the 2019 Recopa Sudamericana, and the winners of the 2018 J.League Cup in the 2019 J.League Cup / Copa Sudamericana Championship. They also automatically qualified for the 2019 Copa Libertadores group stage. Independiente were the defending champions, but did not play in this edition as they qualified for the 2018 Copa Libertadores group stage as Copa Sudamericana champions and later advanced to the knockout stage.
The following 44 teams from the 10 CONMEBOL associations qualified for the tournament, entering the first stage:
A further 10 teams eliminated from the 2018 Copa Libertadores were transferred to the Copa Sudamericana, entering the second stage.
The schedule of the competition was as follows.