Mauricio Alejandro Donoso Pérez (born 30 April 1976) is a Chilean former footballer.
He played as an attacking midfielder during his years active.
He has performed at Cobreloa, Universidad de Chile, Colo-Colo, Everton, Antofagasta in Chile, and Pumas of UNAM in Mexico.
Donoso took part of the Chile U20 squad at the 1995 FIFA World Youth Championship and played a match. At senior level, he was involved in the Chile national team in 1999, and has represented his country twice.
His older brother, José Luis, was a Chile under-20 international footballer and took part of the squad at the 1988 South American U-20 Championship.
He holds Ecuadorian citizenship after having played in Ecuador.