An automatic analyzer, comprising disposable parts such as large quantities of nozzle tips and reaction containers for use in sample analysis inspection, wherein the part rack (12) holding unused parts is raised from a lowest position to a rack separation station (A) by a lift for supply (14) and separated so that only the uppermost stacked part rack can remain on the rack separation station, the separated part rack is moved to a part take-out station (B) where parts on the part rack are taken out one by one from a movable holding part (59), and, by opening the floor part of the part take-out station (B) after part consumption, the used part rack is allowed to fall down and recovered on the lift (84) of a recovery lifter (15), whereby the supply of an unused part rack on which unused parts are loaded and the recovery of a used part rack can be performed with a compact system configuration.