After months of negotiations, the Aussie's move to Teesside is virtually a done deal.
Earlier this month Spanish champions Valencia were interested in taking Viduka to La Liga but he did not want to uproot from his Yorkshire home.
Riverside boss Steve McClaren tried to sign him in January and now it seems he has finally landed his man.
Leeds value the player at around £4m but because of the Whites' financial state there is a strong chance they have accepted less than that figure.
The former Dynamo Zagreb man scored 13 goals last season and since signing in July 2000 from Celtic, Viduka scored 59 goals in 126 Premiership appearances.