Abstract: A flow cytometer capable of easily and reliably providing flow cytometry results without requiring a special trained technician is provided. The flow cytometer 10 includes an input unit 60 that receives an input of information for specifying a measurement item, a condition selection unit 71 for selecting a measurement condition from among one or a plurality of measurement conditions corresponding to information for specifying the measurement item received by the input unit 60, and a measurement unit 65 having a flow cell 20 through which a particle-containing liquid containing particles in the sample passes, wherein the measurement unit 65 optically measures particles of the particle-containing liquid flowing through the flow cell 20 in accordance with the measurement condition selected by the condition selection unit 71.