PURPOSE: To make it possible to accurately and stably preparatively-isolate and dispense liquid samples by providing the neck part with a protrusion for fixing a dropper, at the forward end thereof, tightly to a dropper and setting a specified angle with respect to the axial direction at the groove face.

CONSTITUTION: The dropper and a dropper chip provided with protrusions of the same size at corresponding positions are secured tightly. The dropper chip has a groove face inclining by 45° with respect to the axial direction. The width at the forward end is set at 2mm for cell suspension and at 1.4mm for dilution buffer. The dropper chip is inserted into the dropper body until the protrusions come into contact with each other until to hear click. The dropper chip and the dropper body are fixed tightly to each other and used for various clinical inspections.