The Army says it has had no success in tracking down a powerful anti-personnel mine that has been missing since a training exercise was held west of Brisbane last month.

The device known as a claymore, which is the size of a small suitcase and sprays ball bearings, disappeared during a Queensland University Regiment training exercise.

Ipswich Councillor Paul Tully says the Army has spent $500,000 looking for it.

A Defence Force spokesman says all possible locations have been searched using explosive-detection dogs.