At international level, he represented the Spain national football team.
Born in Elizondo, he began his professional career with Valladolid, making his Primera División debut against Elche in January 17, 1960.
[1] He joined Barcelona in the summer of 1961, staying there for a decade, bar a loan to Osasuna from 1964-1965.
[2] Zaldúa later joined Sabadell in 1971, keeping his football career in Catalonia until his retirement in 1975.
He died at the age of 76 of cancer in his home in Maresme, which he had resided in since retirement.