A sample analyzer, comprising: a reagent holder (11, 12) arranged to hold a plurality of reagents each of which is used for analysis of a sample; a display; a display controlling means configured to control the display so as to display a display screen including: a schematic diagram of the reagent holder (11, 12), and a plurality of information displaying portions (421, 422), displayed on the schematic diagram of the reagent holder (11, 12), corresponding to positions of the plurality of reagents in the reagent holder (11, 12), each of the information displaying portions (421, 422) comprising a reagent name display region (421b, 422b) for displaying a reagent name corresponding to the reagent held by the reagent holder (11, 12) and a reagent information displaying region (421c, 422c) for displaying one of a plurality of reagent information regarding each of the reagents held by the reagent holder (11, 12), the plurality of reagent information regarding each of the reagents comprising first and second reagent information, a display switch receiver configured to receive a display switch instruction of the reagent information displayed in the reagent information displaying regions, wherein the display controlling means is configured to switch the first reagent information displayed in the reagent information displaying regions (421c, 422c) displayed on schematic diagram of the reagent holder (11, 12) to the second reagent information, when the display switch receiver has received the display switch instruction, wherein each of the information displaying portions (421, 422) further comprises a remaining amount indicator (421d, 422d) of the corresponding reagent held by the reagent holder (11, 12) at a background of the reagent information displaying region (421c, 422c) and the reagent name displaying region (421b, 422b); and, the remaining amount indicator of each of the information displaying portions (421, 422) is displayed regardless of the display switch instruction received by the display switch receiver. a reagent holder (11, 12) arranged to hold a plurality of reagents each of which is used for analysis of a sample; a display; a display controlling means configured to control the display so as to display a display screen including: a schematic diagram of the reagent holder (11, 12), and a plurality of information displaying portions (421, 422), displayed on the schematic diagram of the reagent holder (11, 12), corresponding to positions of the plurality of reagents in the reagent holder (11, 12), each of the information displaying portions (421, 422) comprising a reagent name display region (421b, 422b) for displaying a reagent name corresponding to the reagent held by the reagent holder (11, 12) and a reagent information displaying region (421c, 422c) for displaying one of a plurality of reagent information regarding each of the reagents held by the reagent holder (11, 12), the plurality of reagent information regarding each of the reagents comprising first and second reagent information, a schematic diagram of the reagent holder (11, 12), and a plurality of information displaying portions (421, 422), displayed on the schematic diagram of the reagent holder (11, 12), corresponding to positions of the plurality of reagents in the reagent holder (11, 12), each of the information displaying portions (421, 422) comprising a reagent name display region (421b, 422b) for displaying a reagent name corresponding to the reagent held by the reagent holder (11, 12) and a reagent information displaying region (421c, 422c) for displaying one of a plurality of reagent information regarding each of the reagents held by the reagent holder (11, 12), the plurality of reagent information regarding each of the reagents comprising first and second reagent information, a display switch receiver configured to receive a display switch instruction of the reagent information displayed in the reagent information displaying regions, wherein the display controlling means is configured to switch the first reagent information displayed in the reagent information displaying regions (421c, 422c) displayed on schematic diagram of the reagent holder (11, 12) to the second reagent information, when the display switch receiver has received the display switch instruction, wherein each of the information displaying portions (421, 422) further comprises a remaining amount indicator (421d, 422d) of the corresponding reagent held by the reagent holder (11, 12) at a background of the reagent information displaying region (421c, 422c) and the reagent name displaying region (421b, 422b); and, the remaining amount indicator of each of the information displaying portions (421, 422) is displayed regardless of the display switch instruction received by the display switch receiver.