Sampling nozzle, automatic analyzer using the same, and method of manufacturing sampling nozzle

A cylindrical sampling nozzle for piercing a sampling container with rubber to aspirate a sample in the container, the nozzle comprising:

• a hollow extending lengthwise of the sampling nozzle, the hollow including an opening for aspirating the sample;
• a first surface disposed at an end of a tube having the hollow, the first surface having a plane surrounding the opening;
• a second surface disposed opposite the first surface;
• and
• a tip portion of the sampling nozzle formed by an intersection line of the first surface and the second surface, wherein:
• the hollow which is not bent near the tip portion includes the opening;
• the second surface has a curved surface that includes part of a conical shape around a central axis of the cylindrically-shaped sampling nozzle, is curved in a circumferential direction of the cylindrically-shaped sampling nozzle and is tilted linearly with respect to the length of the sampling nozzle;
• and
• a distance between the tip portion of the sampling nozzle and an end of the second surface on a root side of the sampling nozzle is shorter than a distance between the tip portion of the sampling nozzle and an end of the first surface on a root side of the sampling nozzle.