To provide a cuvette stand capable of taking out a cuvette without generating the phenomenon where the flat plate part of the leading end of the cuvette is hooked with an insertion port.

The cuvette stand 6 forms sidewalls 6e which continue to insertion ports 6a of housing parts 7. Even if the cuvette 1 is shifted from the center of each insertion port 6a when taken out, a flat plate part 2a of the leading end of the cuvette 1 comes into contact with each sidewall 6e of the cuvrette stand 6, and the cuvette 1 can be guided to the outlet (insertion port 6a). By this arrangement, the cuvette 1 can be taken out without getting caught.