Automatic analyzer and sample aspiration method in automatic analyzer

An automatic analyzer, comprising:

• a sample dispensing mechanism configured to dispense a sample held by a sample container;
• a liquid level detector configured to detect the liquid level of the sample;
• and
• a control unit configured to control the operation of the sample dispensing mechanism in a first mode and a second mode,
• wherein in the first mode of aspirating the sample, the control unit is configured to control the sample dispensing mechanism so as to
• detect the liquid level,
• to thereafter position the distal end of the sample dispensing mechanism such that the distal end is dropped and stopped below the detected liquid level within such range that the distal end is not in contact with a bottom surface of the sample container,
• to thereafter position the distal end of the sample dispensing mechanism to be elevated and stopped within such range that the distal end of the sample dispensing mechanism does not depart from the liquid level, and
• to thereafter position the distal end of the sample dispensing mechanism to be further dropped while aspirating the sample,
• wherein in the second mode of aspirating the sample, the control unit controls is configured to control the sample dispensing mechanism so as to
• position the distal end of the sample dispensing mechanism dropped and stopped below the detected liquid level, and
• then after position the distal end of the sample dispensing mechanism further lower from the previous position into the sample while aspirating the sample.