Capillary electrophoresis device

A capillary electrophoresis device comprising:

• a plurality of capillaries into which a sample to be measured is introduced and electrically separated;
• a light source that generates light for analyzing the sample electrically separated by the plurality of capillaries;
• a detector that detects light transmitted through the capillaries;
• an optical coupling optical system and a plurality of first optical fibers provided between the light source and the plurality of capillaries;
• and
• a plurality of second optical fibers provided between the plurality of capillaries and the detector,
• wherein the optical coupling optical system couples the light from the light source to the plurality of first optical fibers,
• each of the plurality of first optical fibers has a first end face connected to the optical coupling optical system, and a second end face arranged close to and opposite to a corresponding capillary among the capillaries, and
• each of the plurality of second optical fibers has a first end face arranged close to and opposite to a corresponding capillary among the capillaries, and a second end face connected to the detector.