| Club: | Defensa y Justicia |
| Season: | 2017–18 |
| Manager: | Nelson Vivas (until 24 September 2017) Manuel Fernández (int.) (from 24 September 2017 to 8 October 2017) Juan Vojvoda (from 8 October 2017) |
| Chairman: | José Lemme |
| Stadium: | Estadio Norberto "Tito" Tomaghello |
| League: | Primera División |
| League Result: | 10th |
| Cup1: | 2016–17 Copa Argentina |
| Cup1 Result: | Round of 16 |
| Cup2: | 2017–18 Copa Argentina |
| Cup2 Result: | Round of 64 |
| Cup3: | 2017 Copa Sudamericana |
| Cup3 Result: | Second stage |
| Cup4: | 2018 Copa Sudamericana |
| Cup4 Result: | First stage |
| League Topscorer: | Nicolás Fernández (7) |
| Season Topscorer: | Nicolás Fernández (7) |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 season is Defensa y Justicia's 5th 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 | From | Fee | |
|---|---|---|---|---|---|
| 4 July 2017 | DF |  Lucas Suárez | Sarmiento | Undisclosed[2] [3] | |
| 5 July 2017 | MF | Daniel González | Temperley | Undisclosed | |
| 17 August 2017 | DF | Dylan Gissi | Rosario Central | Undisclosed | |
| 17 August 2017 | FW | Gonzalo Díaz | Vélez Sarsfield | Undisclosed |
| Date | Pos. | Name | To | Fee | |
|---|---|---|---|---|---|
| 1 July 2017 | FW | Nicolás Stefanelli |  AIK | Undisclosed | |
| 6 July 2017 | MF | Jonás Gutiérrez | Independiente | Undisclosed | |
| 10 July 2017 | FW | Andrés Ríos |  Vasco da Gama | Undisclosed |
| Date from | Date to | Pos. | Name | From | |
|---|---|---|---|---|---|
| 1 July 2017 | 30 June 2018 | MF | Nahuel Cisneros | Boca Juniors | |
| 7 July 2017 | 30 June 2018 | MF | Franco Cristaldo | Boca Juniors | |
| 8 July 2017 | 30 June 2018 | MF | Adrián Cubas | Boca Juniors | |
| 30 July 2017 | 30 June 2018 | FW | Fernando Márquez | Belgrano | |
| 31 July 2017 | 30 June 2018 | FW | Facundo Melivilo | Chacarita Juniors | |
| 31 July 2017 | 30 June 2018 | FW | Horacio Tijanovich | Gimnasia y Esgrima | |
| 10 August 2017 | 30 June 2018 | DF | Lisandro Martínez | Newell's Old Boys | |
| 14 August 2017 | 30 June 2018 | MF | Jonathan Requena | Banfield | |
| 22 August 2017 | 30 June 2018 | DF | Leandro Zazpe | Juventud | |
| 24 August 2017 | 30 June 2018 | FW | Fabián Bordagaray | Rosario Central[4] |
| Date from | Date to | Pos. | Name | To | |
|---|---|---|---|---|---|
| 26 July 2017 | 31 December 2017 | DF | Agustin Gómez | AIK | |
| 27 July 2017 | 30 June 2018 | GK | Fernando Pellegrino | Sarmiento | |
| 31 July 2017 | 30 June 2018 | FW | Pablo Bueno | Flandria |
See main article: article and 2017–18 Argentine Primera División.
See main article: article and 2016–17 Copa Argentina.
See main article: article and 2017 Copa Sudamericana.