Alcides Fonseca Júnior, best known as Juninho Fonseca or just Juninho (born in Olímpia, São Paulo State, August 29, 1958) is a former football (soccer) player in central defender role.
In career he played for clubs Ponte Preta (1974–1983 and 1989), Corinthians (1983–1986), Juventus Paulista and Vasco da Gama (1986), Cruzeiro (1987), XV de Piracicaba and Atlético Paranaense (1988), São José (1989), Nacional Paulista (1990), Olímpia (1991), and closed his career in Japan Japan Soccer League in 1992 with Yomiuri FC.
He won one São Paulo State League (1983), one Guanabara Cup (1986), and two Japanese League (1991, 1992).
For Brazil national football team he got in 1980-81 four international caps, never scored a goal. He was in the squad for 1982 FIFA World Cup, without playing any game.