A position adjustment method for a movable unit in a sample analyzer which includes: a measurement section having a plurality of movable units and configured to cause one of the plurality of movable units to operate in order to measure a sample; and a communication section for performing communication with outside, the position adjustment method comprising the steps of: causing a portable terminal device to display a position adjustment screen for accepting an input for changing a position of the movable units, the portable terminal device configured to perform communication with the communication section, the position adjustment screen displaying a plurality of operation locations of the respective movable units; accepting a selection of one of the plurality of operation locations of the respective movable units on the position adjustment screen; in response to the selection of one of the plurality of operation locations of the respective movable units, displaying, on the position adjustment screen, an image showing the selected one of the plurality of operation locations and set value items of the selected one of the plurality of operation locations, each set value item defining a moved position of the unit relative to its operation position; accepting an input for changing a set value of the selected one of the plurality of operation locations on the position adjustment screen; in response to the input for changing the set value of the selected one of the plurality of operation locations; transmitting the changed set value from the terminal device to the communication section; and causing the measurement section to execute a movement of the respective unit of the selected one of the plurality of operation locations in accordance with the changed set value received by the communication section. causing a portable terminal device to display a position adjustment screen for accepting an input for changing a position of the movable units, the portable terminal device configured to perform communication with the communication section, the position adjustment screen displaying a plurality of operation locations of the respective movable units; accepting a selection of one of the plurality of operation locations of the respective movable units on the position adjustment screen; in response to the selection of one of the plurality of operation locations of the respective movable units, displaying, on the position adjustment screen, an image showing the selected one of the plurality of operation locations and set value items of the selected one of the plurality of operation locations, each set value item defining a moved position of the unit relative to its operation position; accepting an input for changing a set value of the selected one of the plurality of operation locations on the position adjustment screen; in response to the input for changing the set value of the selected one of the plurality of operation locations; transmitting the changed set value from the terminal device to the communication section; and causing the measurement section to execute a movement of the respective unit of the selected one of the plurality of operation locations in accordance with the changed set value received by the communication section.