A sample analyzer comprising: a first measurement unit for aspirating a sample, measuring a first measurement item and not measuring a second measurement item different from the first measurement item; a second measurement unit for aspirating a sample and measuring the first and second measurement item; a transport unit for transporting sample containers each of which containing a sample to the first measurement unit or the second measurement unit by transporting a sample rack holding the sample containers to the first measurement unit or the second measurement unit; and a controller configured to perform operations comprising: obtaining measurement item information indicating a measurement item of the sample contained in the sample container held by the sample rack; obtaining a first state information indicating an operation state of the first measurement unit and a second state information indicating an operation state of the second measurement unit; and controlling the transport unit so as to transport the sample rack to either the first measurement unit or the second measurement unit based on the obtained measurement item information, the first state information and the second state information, characterized in that the sample analyzer is configured so that when (i) the sample rack holds a first sample container containing a first sample and a second sample container containing a second sample in order, and when (ii) a first measurement item information of the first sample indicates the first measurement item and a second measurement item information of the second sample indicates the first and second measurement items, and when (iii) the first state information indicates that the first measurement unit is not ready to aspirate a sample and the second state information indicates that the second measurement unit is ready to aspirate a sample, then the controller controls the transport unit so as to transport the second sample container to the second measurement unit prior to the first sample container. a first measurement unit for aspirating a sample, measuring a first measurement item and not measuring a second measurement item different from the first measurement item; a second measurement unit for aspirating a sample and measuring the first and second measurement item; a transport unit for transporting sample containers each of which containing a sample to the first measurement unit or the second measurement unit by transporting a sample rack holding the sample containers to the first measurement unit or the second measurement unit; and a controller configured to perform operations comprising: obtaining measurement item information indicating a measurement item of the sample contained in the sample container held by the sample rack; obtaining a first state information indicating an operation state of the first measurement unit and a second state information indicating an operation state of the second measurement unit; and controlling the transport unit so as to transport the sample rack to either the first measurement unit or the second measurement unit based on the obtained measurement item information, the first state information and the second state information, characterized in that the sample analyzer is configured so that when (i) the sample rack holds a first sample container containing a first sample and a second sample container containing a second sample in order, and when (ii) a first measurement item information of the first sample indicates the first measurement item and a second measurement item information of the second sample indicates the first and second measurement items, and when (iii) the first state information indicates that the first measurement unit is not ready to aspirate a sample and the second state information indicates that the second measurement unit is ready to aspirate a sample, then the controller controls the transport unit so as to transport the second sample container to the second measurement unit prior to the first sample container. obtaining measurement item information indicating a measurement item of the sample contained in the sample container held by the sample rack; obtaining a first state information indicating an operation state of the first measurement unit and a second state information indicating an operation state of the second measurement unit; and controlling the transport unit so as to transport the sample rack to either the first measurement unit or the second measurement unit based on the obtained measurement item information, the first state information and the second state information, characterized in that the sample analyzer is configured so that when (i) the sample rack holds a first sample container containing a first sample and a second sample container containing a second sample in order, and when (ii) a first measurement item information of the first sample indicates the first measurement item and a second measurement item information of the second sample indicates the first and second measurement items, and when (iii) the first state information indicates that the first measurement unit is not ready to aspirate a sample and the second state information indicates that the second measurement unit is ready to aspirate a sample, then the controller controls the transport unit so as to transport the second sample container to the second measurement unit prior to the first sample container.