Abstract: With an analyzer capable of carrying out a plurality of kinds of analyses, the device is suppressed from being increased in size. The analyzer includes a first measurement unit for holding a cuvette to which a biological sample is dispensed, and performing a first measurement of a content of the cuvette; a second measurement unit for holding a cuvette, and performing a second measurement different from the first measurement of the content of the cuvette; and a transport unit for gripping the cuvette, and transporting the cuvette to an attachment and detachment position of the first measurement unit or an attachment and detachment position of the second measurement unit. The transport unit moves along a guide rail, and the attachment and detachment position of the first measurement unit and the attachment and detachment position of the second measurement unit are provided on a line substantially along the guide rail.

Abstract: To efficiently prevent a decrease in measurement accuracy caused by a change in a test cartridge and an environmental temperature, provided is an automatic analysis device. The automatic analysis device includes: a constant-temperature reservoir (6) to be heated by a heating source (6a) so as to keep a liquid temperature at least in the reaction cell (11c) of the test cartridge (10) in the test stage (KT) at a constant environmental temperature set previously; constant-temperature reservoir control means (7) including a temperature detector (7a), for controlling a set temperature of the heating source (6a) of the constant-temperature reservoir (6) so that the set temperature of the heating source (6a) is higher when the internal environmental temperature is lower than a previously-determined threshold value than when the internal environmental temperature is equal to or higher than the threshold value, based on the internal environmental temperature detected by the temperature detector (7a).