1. A method for merging measurements of a flight parameter of an aircraft, from measurements of the parameter supplied respectively by a plurality of sensors, comprising: 1) searching for a possible anomaly on one out of at least two sensors, called sensors of interest, comprising the following substeps: 1a) for each sensor of interest, computing a so-called detection deviation, proportional to the absolute value of a difference between a measurement supplied by this sensor of interest, and an estimation of the parameter computed from the measurements supplied by the other sensors of interest; 1b) comparing each detection deviation to a corresponding predetermined threshold; 1c) based on the result of the comparisons, determining the presence or the absence of an anomaly on one of the sensors of interest with a determined total probability of false alarm; and 2) merging measurements supplied by the sensors of interest, to provide an estimation of the parameter, called final estimation.