To mount tips, in a plurality of sizes, having different connection-side opening diameters on one nozzle and to perform a dispensing operation smoothly when a dispensing amount is changed.

This nozzle 10 is constituted so as to contain a connection part 15 by which a large tip 12 and a small tip 13 of two kinds can be mounted on the side of a tip 10A. The connection part 15 is formed of a step part 28 which is formed along the outer circumference on the side of the tip 10A of the nozzle 10, and it is composed of a first taper face 30 and a second taper face 31 which are formed in a step manner by using the step part 28 as a boundary. The first taper face 30 is formed in an outer face shape according to the inner face shape in set regions in the upper part and the lower part of the connection-side opening part 22 of the large tip 12, On the other hand, the second taper face 31 is formed in an outer face shape according to the inner face shape in set regions in the upper part and the lower part of the connection- side opening part 23 of the small tip 13. Thereby, the large tip 12 and the small tip 13 are held by the nozzle 10 by a taper fitting operation so as not to be capable of falling.