The 2005 A-League Pre-season Challenge Cup was the first edition of the A-League Pre-season Challenge Cup, played in the lead-up to the inaugural season of the A-League. The competition involved all eight A-League clubs. The competition was won by the Central Coast Mariners, who beat Perth Glory 1–0 in the final.
Group stage Group A
Group B
Knockout stage
Semi-finals
Final
Top scorers PositionPlayerClubGoals1 Nik MrdjaCentral Coast Mariners3 Bobby DespotovskiPerth Glory Sasho PetrovskiSydney FC4 Michael ValkanisAdelaide United2 Damien BrownCentral Coast Mariners Tom PondeljakCentral Coast Mariners Archie ThompsonMelbourne Victory Royce BrownlieQueensland Roar Reece TollenaereQueensland Roar