A method for searching for and detecting a gamma radiation source in conditions of nonuniform radioactive contamination, comprising: - providing a platform comprising a collimated detector having an axis of measurement of gamma radiation dose and a laser rangefinder having an axis of measurement of distance to an object, - detection of a gamma radiation source, and - establishing and recording of the radiation dose rate by pointing in sequence aiming axes (7, 8) of the collimated detector and laser rangefinder, which are installed on the platform, at the gamma radiation source, wherein a gamma radiation source with a maximally high level of radiation is determined, the radiation dose rate is established by using the collimated detector, and the distance to the gamma radiation source is simultaneously determined with the aid of the laser rangefinder, wherein the axes (7, 8) of the collimated detector and the laser rangefinder are aimed in parallel and set apart horizontally, readings of the laser rangefinder and the value of the radiation dose rate established by the collimated detector are recorded, and, on the basis of these data, the radiation dose rate from the gamma radiation source is calculated, after which, said method being characterized in that, in order to verify the accuracy of the measured distance to the gamma radiation source, the aiming axis of the laser rangefinder is moved a certain distance horizontally, and the measurement of the distance to the gamma radiation source is repeated and the such measured distance is recorded, the results of successive measurements of the distance are compared and, in the event of a discrepancy in the measurements within the laser rangefinder error limits, the measurements of the distance are taken as reliable - providing a platform comprising a collimated detector having an axis of measurement of gamma radiation dose and a laser rangefinder having an axis of measurement of distance to an object, - detection of a gamma radiation source, and - establishing and recording of the radiation dose rate by pointing in sequence aiming axes (7, 8) of the collimated detector and laser rangefinder, which are installed on the platform, at the gamma radiation source, wherein a gamma radiation source with a maximally high level of radiation is determined, the radiation dose rate is established by using the collimated detector, and the distance to the gamma radiation source is simultaneously determined with the aid of the laser rangefinder, wherein the axes (7, 8) of the collimated detector and the laser rangefinder are aimed in parallel and set apart horizontally, readings of the laser rangefinder and the value of the radiation dose rate established by the collimated detector are recorded, and, on the basis of these data, the radiation dose rate from the gamma radiation source is calculated, after which, said method being characterized in that, in order to verify the accuracy of the measured distance to the gamma radiation source, the aiming axis of the laser rangefinder is moved a certain distance horizontally, and the measurement of the distance to the gamma radiation source is repeated and the such measured distance is recorded, the results of successive measurements of the distance are compared and, in the event of a discrepancy in the measurements within the laser rangefinder error limits, the measurements of the distance are taken as reliable wherein a gamma radiation source with a maximally high level of radiation is determined, the radiation dose rate is established by using the collimated detector, and the distance to the gamma radiation source is simultaneously determined with the aid of the laser rangefinder, wherein the axes (7, 8) of the collimated detector and the laser rangefinder are aimed in parallel and set apart horizontally, readings of the laser rangefinder and the value of the radiation dose rate established by the collimated detector are recorded, and, on the basis of these data, the radiation dose rate from the gamma radiation source is calculated, after which, said method being characterized in that, in order to verify the accuracy of the measured distance to the gamma radiation source, the aiming axis of the laser rangefinder is moved a certain distance horizontally, and the measurement of the distance to the gamma radiation source is repeated and the such measured distance is recorded, the results of successive measurements of the distance are compared and, in the event of a discrepancy in the measurements within the laser rangefinder error limits, the measurements of the distance are taken as reliable