Five years later, at the Eurovision Song Contest 1969, held in Madrid, Spain, she represented France performing "Un jour, un enfant" ("A day, a child") – with music by Émile Stern and text by Eddy Marnay.

Songwriter Eddy Marnay was her professional partner (most of the songs performed by Boccara were written by him), but she also performed songs composed by Jacques Brel, Georges Brassens, Charles Aznavour, Émile Stern, Michel Legrand, Michel Magne, Nino Rota and Mikis Theodorakis.

Other of her famous songs include "Cherbourg avait raison" (1961), "Aujourd'hui" (1965), "Les moulins de mon cœur" (1969), "L'enfant aux cymbales" (1969), "Belle du Luxembourg" (1969), "La croix, l'étoile et le croissant" (1970), "Venise va mourir" (1970), "Trop jeune ou trop vieux" (1971), "Valdemosa" (1976), "L'année où Piccoli jouait Le choses de la vie" (1978), "Un monde en sarabande" (1979) and "La prière" (1979).

In the late 1960s, she also recorded "Un pays pour nous", a song that was a French version of "Somewhere" (from the musical West Side Story).

Boccara renewed her links with Eurovision by participating in the French national finals of 1980 – performing "Un enfant de France" – and 1981 – with "Voilà comment je t'aime".