[1] Iru was born in Bilbao in the province of Biscay, in the Basque Country, and began his career with Biscayan club Barakaldo.
He joined Eibar in 1998, where he played in the second tier for four seasons before signing for Segunda División B side Amurrio in 2002, where he finished his career.
He made another return to the club in 2011, this time becoming goalkeeping coach for the first team, replacing Luis Llopis.
[7][8] Like Ziganda, he chose to bring his goalkeeping coach with him, meaning Iru was promoted to the first team once again, replacing Carlos Kisluk.
Aitor's brother Patxi Iru [es], older by almost six years, was also a goalkeeper, representing both Athletic Bilbao and Osasuna in La Liga.