An analyzer comprising: a first measurement unit for measuring samples; a second measurement unit for measuring samples; a transportation device for transporting samples to the first measurement unit and the second measurement unit; prior sample measurement instructor for instructing to measure a predetermined sample prior to the other samples; and a transportation controller for controlling the transportation device to reserve the transportation of the other samples to the second measurement unit and to perform the other transportation operation, when the prior sample measurement instructor has instructed to measure the predetermined sample by the second measurement unit prior to the other samples, is disclosed. A sample transportation method and a computer program product are also disclosed.