AN anti-personnel mine is missing from an army training area near Brisbane.

The Claymore mine could not be accounted for after an army exercise at the Greenbank Training Area in late January.

A statement from police said the device consists of a horizontally convex green plastic case supported by two pairs of scissor legs attached to the bottom.

It is approximately 22cm long, 12cm high and 4cm wide and weighs approximately 1.5kg.

A Claymore mine is capable of firing hundreds of ball bearings about 100m within a 60-degree arc.