A sample testing apparatus comprising: a transport unit for transporting a sample container containing a sample through a first position and a second position; a testing unit (51, 511) for aspirating the sample from the sample container transported to the first position by the transport unit and for performing a test on the aspirated sample; a determination result obtainer for obtaining one of a first determination result indicating that a second test by the testing unit is required for the sample and a second determination result indicating that the second test is not required for the sample, based on a test result of a first test on the sample; and a transport controller for controlling the transport unit so as to transport the sample container back to the first position, the sample container containing the sample on which the first test has been performed, if the determination result obtainer has obtained the first determination result on the sample; wherein the sample container is not transported beyond the second position from the first position side before the determination result obtainer has obtained any one of the first and the second determination result on the sample, the first and the second positions being upstream from a second testing unit, characterized in that the transport controller is configured to control the transport unit so as to transport the sample container back to the first position without transporting the sample container to the second position, if the determination result obtainer has obtained the first determination result on the sample before the sample container has reached the second position. a transport unit for transporting a sample container containing a sample through a first position and a second position; a testing unit (51, 511) for aspirating the sample from the sample container transported to the first position by the transport unit and for performing a test on the aspirated sample; a determination result obtainer for obtaining one of a first determination result indicating that a second test by the testing unit is required for the sample and a second determination result indicating that the second test is not required for the sample, based on a test result of a first test on the sample; and a transport controller for controlling the transport unit so as to transport the sample container back to the first position, the sample container containing the sample on which the first test has been performed, if the determination result obtainer has obtained the first determination result on the sample; wherein the sample container is not transported beyond the second position from the first position side before the determination result obtainer has obtained any one of the first and the second determination result on the sample, the first and the second positions being upstream from a second testing unit, characterized in that the transport controller is configured to control the transport unit so as to transport the sample container back to the first position without transporting the sample container to the second position, if the determination result obtainer has obtained the first determination result on the sample before the sample container has reached the second position.