Patent ID: 8366896

Claim:
A capillary electrophoresis device comprising: a capillary; a power supply for applying a high voltage to both ends of the capillary; an optical system for irradiating a sample separated by electrophoresis in the capillary with an exciting light to detect fluorescence from the sample; a holder in which any one of the sample and a solution is stored; and an autosampler for transferring the holder, wherein the holder includes: a container having a plurality of wells for storing the any one of the sample and the solution; a septum having a capillary hole through which the capillary penetrates and is made of an elastic deformable material for covering the holder; and a container-accommodation unit for holding the container and covering a bottom surface and side surface of the container, wherein: the container includes a first engagement portion formed on the top surface thereof and a second engagement portion including a convex portion formed on a side surface thereof, the container-accommodation unit has an elastic deformable boss on a top surface thereof, the first engagement portion is provided in a periphery of the plurality of wells, the septum has a third engagement portion engaging with the first engagement portion, either the first engagement portion or the third engagement portion has a boss including a head and a constriction and the other of the first engagement portion and the third engagement portion has a hole, the boss has a T-shaped cross section, the constriction engages the hole of the first engagement portion or the third engagement portion by elastic deformation of the septum, and the head protrudes from the hole, so that the septum is held to cover the container, and the second engagement portion engages with the boss of the container-accommodation unit by the elastic deformation.