Just one in ten police officers in Northern Ireland believe Ombudsman Ms Nuala O'Loan acts impartially, it was revealed tonight.
A new survey to be published later this month also discloses high levels of dissatisfaction in her work among chief constable Hugh Orde's rank and file.
In another finding, a majority of officers questioned said they would like to be able to complain to her about their colleagues.
With the Ombudsman set up to probe allegations made by the public that would require changes to the legislation.
But some policing representatives described the poll as a scathing assessment which proved the force's trust in her fairness has been shattered.
Hardline unionists angered that the poll was carried out 12 months ago but is yet to be published also called on the authorities to replace her.
Mr Sammy Wilson, a DUP member of the Northern Ireland Policing Board, said: "Clearly the police have no confidence in her office.
He said: "The government should be looking at establishing a three-person panel to restore belief in the Ombudsman's office."
Ms O'Loan was brought in four years ago to head up a new police complaints system as part of the Patten recommendations for sweeping changes to the force.
But ever since her appointment she has endured a tense relationship with senior officers who have, at times, found her criticisms hard to stomach.
PA