The 2017–18 season is Real Madrid Club de Fútbol's 114th season in existence and the club's 87th consecutive season in the top flight of Spanish football. It covers a period from 1 July 2017 to 30 June 2018.

Theo Hernández and Dani Ceballos joined Madrid on 5 and 14 July 2017.

Pepe went to Beşiktaş after his contract was up after the last season.James Rodríguez and Fábio Coentrão were loaned to Bayern Munich and Sporting CP respectively.

Mariano Díaz Mejía was transferred to Lyon. On 21 July, Álvaro Morata moved to Chelsea. Two days later, Danilo left Madrid and joined Manchester City.

On 8 August 2017, Madrid won the 2017 UEFA Super Cup, beating Manchester United 2–1 with goals from Casemiro and Isco. On 13 August 2017, Madrid won the first leg of the 2017 Supercopa de España, defeating Barcelona 3–1 with goals from Cristiano Ronaldo and Marco Asensio and an own goal. Three days later, on 16 August 2017, Madrid won the title, after a 2–0 win (5–1 on aggregate) with goals from Asensio and Karim Benzema. Goals from Gareth Bale, Casemiro and Toni Kroos gave Madrid a 3–0 winning start in the League campaign at Deportivo La Coruña on 20 August 2017. On 24 August 2017, the 2017–18 UEFA Champions League group stage draw was held and Madrid was drawn in Group H, along with Borussia Dortmund, Tottenham Hotspur and APOEL. On 27 August 2017, two goals from Asensio were not enough as Madrid drew Valencia 2–2.