| Club: | Unión de Santa Fe |
| Season: | 2017–18 |
| Manager: | Leonardo Madelón (from 10 July 2017) |
| Chairman: | Luis Spahn |
| Chrtitle: | President |
| Stadium: | Estadio 15 de Abril |
| League: | Primera División |
| League Result: | 3rd |
| Cup1: | 2016–17 Copa Argentina |
| Cup1 Result: | Round of 16 |
| Cup2: | 2017–18 Copa Argentina |
| Cup2 Result: | Round of 64 |
| League Topscorer: | Franco Soldano (6) |
| Season Topscorer: | Two players (6) |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 season is Unión de Santa Fe's 4th 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 | |
|---|---|---|---|---|---|
| 16 July 2017 | MF |  Damián Arce | Patronato | Undisclosed[2] [3] | |
| 20 July 2017 | MF | Diego Zabala | Racing de Montevideo | Undisclosed | |
| 22 July 2017 | MF | Claudio Aquino | Independiente | Undisclosed |
| Date | Pos. | Name | To | Fee | |
|---|---|---|---|---|---|
| 13 July 2017 | MF | Diego Villar | Aldosivi | Undisclosed | |
| 16 July 2017 | MF | Martín Rivero | Patronato | Undisclosed | |
| 16 July 2017 | MF | Santiago Magallán |  Cultural Leonesa | Undisclosed | |
| 18 July 2017 | DF | Nahuel Zárate | Atlético Tucumán | Undisclosed | |
| 31 July 2017 | GK | Ignacio Arce | San Martín de Tucumán | Undisclosed |
| Date from | Date to | Pos. | Name | From | |
|---|---|---|---|---|---|
| 2 August 2017 | 30 June 2018 | MF | Julián Vitale | Independiente | |
| 2 August 2017 | 30 June 2018 | DF | Damián Martínez | Independiente |
| Date from | Date to | Pos. | Name | To |
|---|---|---|---|---|
| 27 July 2017 | 30 June 2018 | MF | Mariano Mauri | Unión Sunchales |
| 31 July 2017 | 30 June 2018 | DF | Rodrigo Erramuspe |  Independiente Medellín[4] |
See main article: article and 2017–18 Argentine Primera División.
See main article: article and 2016–17 Copa Argentina.