The present invention is intended to improve response property and accuracy of temperature control of a liquid sample, and is provided with a vaporization tank that retains the liquid sample, one or more heaters that are provided in the vaporization tank and respectively have heating parts that come into contact with the liquid sample to heat the liquid sample, a temperature detection part that is provided in contact with an outer surface including the heating part of any of the heaters and detects a temperature of the outer surface, and a control part that receives a temperature detection signal from the temperature detection part to control electric power supplied to the heaters.