The present invention is to present a sample analyzer which is capable of displaying a particle distribution map of a measured sample and a reference particle distribution map so as to be visually compared without reducing a display area for displaying information other than the particle distribution map. The blood analyzer 1 comprises: a display 302； a measurement unit 2 for measuring a blood sample； and a controller 301 being configured to 1) generate a particle distribution map representing a distribution of the particles contained in the blood sample, based on measurement data obtained by the measurement unit 2； and 2) control the display 302 so as to display the particle distribution map of the blood sample at a predetermined display position and to display a reference particle distribution map at the predetermined display position so as to be visually compared with the particle distribution map of the blood sample.
