| Club: | Newell's Old Boys |
| Season: | 2017–18 |
| Manager: | Juan Manuel Llop Omar De Felippe |
| Chairman: | Eduardo Bermúdez |
| Stadium: | Estadio Marcelo Bielsa |
| League: | Primera División |
| League Result: | 24th |
| Cup1: | 2016–17 Copa Argentina |
| Cup1 Result: | Round of 32 |
| Cup2: | 2017–18 Copa Argentina |
| Cup2 Result: | Round of 64 |
| Cup3: | Copa Sudamericana |
| Cup3 Result: | First stage |
| League Topscorer: | Two players (3) |
| Season Topscorer: | Two players (3) |
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| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 season is Newell's Old Boys' 56th consecutive season in the top-flight of Argentine football. The season covers the period from 1 July 2017 to 30 June 2018.
.[1]
| Date | Pos. | Name | To | Fee | |
|---|---|---|---|---|---|
| 1 July 2017 | FW |  Ignacio Scocco | River Plate | Undisclosed[2] | |
| 1 July 2017 | DF | Maximiliano Pollacchi | Colegiales | Undisclosed | |
| 18 July 2017 | MF | Eugenio Isnaldo | Asteras Tripolis | Undisclosed | |
| 19 July 2017 | MF | Jacobo Mansilla | Tigre | Undisclosed | |
| 26 July 2017 | MF | Maxi Rodríguez | Peñarol | Undisclosed | |
| 31 July 2017 | MF | Federico Fattori | Nueva Chicago | Undisclosed | |
| 31 July 2017 | FW | Franco Pérez |  Morelia | Undisclosed | |
| 27 August 2017 | MF | Emiliano Franco | Douglas Haig | Undisclosed |
| Date from | Date to | Pos. | Name | From | |
|---|---|---|---|---|---|
| 6 July 2017 | 30 June 2018 | FW |  Mauro Guevgeozián | Temperley[3] | |
| 14 July 2017 | 30 June 2018 | DF | Bruno Bianchi | Atlético Tucumán[4] | |
| 20 July 2017 | 30 June 2018 | FW | Brian Sarmiento | Banfield[5] | |
| 22 July 2017 | 30 June 2018 | GK | Nelson Ibáñez | Tigre[6] | |
| 27 July 2017 | 30 June 2018 | MF | Nery Leyes | Atlético Tucumán[7] | |
| 31 July 2017 | 30 June 2018 | DF | Danilo Ortiz | Godoy Cruz | |
| 6 August 2017 | 30 June 2018 | FW |  Luís Leal | Chiapas |
| Date from | Date to | Pos. | Name | To | |
|---|---|---|---|---|---|
| 1 July 2017 | 30 June 2018 | DF | Gabriel Báez | Venados | |
| 10 August 2017 | 30 June 2018 | DF | Lisandro Martínez | Defensa y Justicia | |
| 14 August 2017 | 30 June 2018 | FW | Matías Tissera | Quilmes | |
| 15 August 2017 | 30 June 2018 | MF | Iván Silva | Guillermo Brown | |
| 18 August 2017 | 30 June 2018 | FW | Francisco Fydriszewski |  Lugo | |
| 19 August 2017 | 30 June 2018 | MF | Marcos Pérez | Sportivo Belgrano | |
| 26 January 2018 | 8 December 2018 | DF | Milton Valenzuela |  Columbus Crew SC[8] |
See main article: article and 2017–18 Argentine Primera División.
See main article: article and 2016–17 Copa Argentina.
See main article: article and 2018 Copa Sudamericana.