Reaction vessel and automatic analyzing device

An automatic analyzing device comprising:

• a reaction cuvette configured to house a mixed liquid of a reagent and a sample to be measured, the reaction cuvette including a cuvette main body and a aspiration port that is disposed on the cuvette main body for allowing a fluid to flow into an inner part of the cuvette main body from a bottom surface side of the cuvette main body;
• and
• a measuring part configured to measure the mixed liquid in the reaction cuvette, wherein
• the fluid is the sample,
• the automatic analyzing device further comprises an aspirating device configured to aspirate the sample into the cuvette main body through the aspiration port,
• the reaction cuvette further comprises
• a reaction chamber that is disposed inside the cuvette main body, and configured to house a reagent that reacts with the sample;
• and
• a flow channel control part configured to allow the sample to flow into the reaction chamber by forming a flow channel from the aspiration port to the aspirating device via the reaction chamber,
• a decompression chamber and a compression chamber are disposed in the cuvette main body,
• the reaction chamber includes a first reaction chamber housing a first reagent, and a second reaction chamber housing a second reagent, and
• the flow channel control part
• allows the sample to flow into the first reaction chamber by forming a first flow channel as the flow channel from the aspiration port to the decompression chamber via the first reaction chamber, and
• allows a mixed liquid of the sample and the first reagent to flow into the second reaction chamber by forming a second flow channel from the compression chamber to the second reaction chamber via the first reaction chamber after forming the first flow channel.