A sample analyzer comprising: a measurement section; a transportation section; an identification data obtainer; and a system controller; is disclosed. The system controller is configured to acquire a result of determination regarding whether a sample needs a re-measurement for a sample based on a result of a measurement of the sample. When the system controller recognizes a presence of the washing fluid tube transported by the transportation section before a determination result regarding a necessity of re-measurement is obtained for an already aspirated sample, the system controller prohibits the supply of the washing fluid in the washing fluid tube to the measurement section.