Patent ID: 8454823

Claim:
A sample stirring device comprising: three rollers adapted to come into contact with a sample container including a cylindrical portion for containing a sample to be stirred, the three rollers being spaced apart from each other in a circumferential direction of the cylindrical portion, wherein: one of the three rollers is a rotation driving roller having a rotation axis extending in the axial direction of the cylindrical portion, and the other two of the three rollers are follower rollers having rotation axes inclined toward a same side with respect to the axial direction of the cylindrical portion; the rotation driving roller is configured to be driven for rotation to stir the sample contained in the sample container, and the follower rollers have a rotation axis inclined with respect to an axial direction of the cylindrical portion; the sample stirring device comprising: a sample container moving mode for moving the sample container toward a first side in the axial direction by rotating the rotation driving roller in a first direction; and a sample stirring mode for stirring the sample, by rotating the rotation driving roller in a second direction reverse to the first direction, with a supporter for preventing the sample container from moving toward a second side opposite from the first side in the axial direction being arranged on the second side of the sample container.