 In the 2015–16 season, Ederson started as a second choice in line for the first team, defended by compatriot and international Júlio César.Ederson first played some matches in the Segunda Liga with the reserve team and in the Taça da Liga with the main squad, before playing in the Primeira Liga on 5 March 2016 against local rivals Sporting CP, replacing injured Júlio César.Benfica won the Lisbon derby 0–1 and took the first place of Primeira Liga.