An analyzer comprising: a first specimen holder configured to hold a plurality of first specimen containers; a conveying assembly for conveying the first specimen containers held in the first specimen holder; a second specimen holder arranged at a position higher than an upper end of the first specimen containers held in the first specimen holder; a holder moving assembly for moving the second specimen holder so as to pass the upper side of at least one of the first specimen containers held in the first specimen holder; a container transferring assembly for transferring at least one of the first specimen containers from the first specimen holder to the second specimen holder; and a controller for controlling the holder moving assembly and the container transferring assembly, is disclosed.