An automatic analysis apparatus that can suction a target sample through an sample dispensing probe at a single sample dispensing position by transferring a sample rack holder having one or more sample containers from a first sampler unit to a second sampler unit and by moving the transferred sample rack in a horizontal direction and up-and-down directions at the fixed single sample dispensing position. By fixing a fluid sampling position of a sample container held by a sample rack at the single position, a sample dispensing accuracy of an automatic analysis apparatus can be increased.