The present disclosure relates to a bioparticle measuring method including forming on a solid phase a complex of a sample containing a bioparticle sampled from a specimen, a capturer containing a tag which binds to the solid phase and capable of binding to the bioparticle, and a detector capable of binding to the bioparticle and containing a labeled substance. A part or the whole of the complex may be dissociated from the solid phase to prepare a measurement sample containing a part or the whole of the complex not fixed on the solid phase, and signals from the measurement sample may be detected by a particle analyzer.