Marta Unzué Urdániz (born 4 July 1988) is a Spanish professional footballer who plays as a defensive midfielder and occasionally as a right-back for Primera División club Athletic Bilbao.

She spent over a decade with Barcelona, winning several trophies and featuring in the UEFA Women's Champions League.

Elba left the club after four years, but Marta remained and was appointed captain after the departure of Vicky Losada in 2015.

On 24 July 2018, a deal was agreed for 30-year-old Unzué to join Athletic Bilbao on a two-year loan contract.

[7] At the end of her loan contract, in April 2020, she announced her departure from FC Barcelona after 14 years with the club to permanently transfer to Athletic Bilbao.