The 47-year-old female shooter, described as experienced with tigers, was bitten in the arm and suffered serious lacerations and puncture wounds.
Staff at Dreamworld in the capital Canberra managed to stop the bleeding before the shooter was taken to hospital. Her condition is reported to be stable.
The amusement park has nine tigers of the Sumatran and Bengal tiger species.
The attack is described as an "isolated and unusual" incident that will be investigated.
