A hematological analyzer for measuring blood, comprising: a measurement mode setting means configured to set a blood measurement mode performing blood analysis by measuring blood samples as analysis objects and by applying a first analysis process; or a body fluid measurement mode performing body fluid analysis by measuring body fluids as analysis objects and by applying a second analysis process and being different from the first analysis process, wherein the body fluids is selected from a group consisting of cerebrospinal fluid, thoracic fluid, abdominal fluid, fluid of the cardiac sac, synovial fluid, dialysate from peritoneal dialysis, and intraperitoneal rinse; a measurement starting means configured to receive a measurement start instruction; an optical information obtaining means (406, 411, 412) configured to irradiate a measurement sample with light and obtaining optical information from cells contained in the measurement sample; and an analyzing means configured to classify, according to the first analysis process, the white blood cells contained in the blood sample into a plurality of subclasses based on the optical information obtained from the cells in the measurement sample prepared from a blood sample and a white blood cell measuring reagent when the blood measurement mode has been set and the measurement starting means has received the measurement start instruction, wherein the analyzing means is configured to classify, according to the second analysis process, at least white blood cells and anomalous particles other than blood cells contained in the body fluid sample and appearing in a predetermined part of a measurement scattergram being a particle distribution map and to count the white blood cells and anomalous particles other than blood cells which are distributed in a region of high fluorescence in the measurement scattergram based on the optical information obtained from the cells in the measurement sample prepared from a body fluid sample and the white blood cell measuring reagent when the body fluid measurement mode has been set and the measurement starting means has received the measurement start instruction. a measurement mode setting means configured to set a blood measurement mode performing blood analysis by measuring blood samples as analysis objects and by applying a first analysis process; or a body fluid measurement mode performing body fluid analysis by measuring body fluids as analysis objects and by applying a second analysis process and being different from the first analysis process, wherein the body fluids is selected from a group consisting of cerebrospinal fluid, thoracic fluid, abdominal fluid, fluid of the cardiac sac, synovial fluid, dialysate from peritoneal dialysis, and intraperitoneal rinse; a blood measurement mode performing blood analysis by measuring blood samples as analysis objects and by applying a first analysis process; or a body fluid measurement mode performing body fluid analysis by measuring body fluids as analysis objects and by applying a second analysis process and being different from the first analysis process, wherein the body fluids is selected from a group consisting of cerebrospinal fluid, thoracic fluid, abdominal fluid, fluid of the cardiac sac, synovial fluid, dialysate from peritoneal dialysis, and intraperitoneal rinse; a measurement starting means configured to receive a measurement start instruction; an optical information obtaining means (406, 411, 412) configured to irradiate a measurement sample with light and obtaining optical information from cells contained in the measurement sample; and an analyzing means configured to classify, according to the first analysis process, the white blood cells contained in the blood sample into a plurality of subclasses based on the optical information obtained from the cells in the measurement sample prepared from a blood sample and a white blood cell measuring reagent when the blood measurement mode has been set and the measurement starting means has received the measurement start instruction, wherein the analyzing means is configured to classify, according to the second analysis process, at least white blood cells and anomalous particles other than blood cells contained in the body fluid sample and appearing in a predetermined part of a measurement scattergram being a particle distribution map and to count the white blood cells and anomalous particles other than blood cells which are distributed in a region of high fluorescence in the measurement scattergram based on the optical information obtained from the cells in the measurement sample prepared from a body fluid sample and the white blood cell measuring reagent when the body fluid measurement mode has been set and the measurement starting means has received the measurement start instruction.