The present application provides: an emulsion production member for dividing a sample into fine droplets and dispersing the fine droplets in a dispersion medium to produce an emulsion； and a sample collection tube and a blood collection tube, each of which is equipped with the emulsion production member. The emulsion production member is provided with: a plug body, a sample injection hole, a sample storage unit, a dispersion medium injection hole, and a dispersion medium storage unit. The emulsion production member is further provided with: a discharge port； a sample flow passage； and a dispersion medium flow passage for connecting the dispersion medium storage unit and the sample flow passage to each other to cause the dispersion medium to flow in order to divide the sample circulating in the sample flow path into fine droplets by means of the dispersion medium.
