After a sample is previously separated into plural components in a channel
formed in a microchip (353), the channel is irradiated along a separation
direction with a laser beam from a laser oscillator (361) to sequentially
ionize each fraction separated in the channel. The ionized fraction is
detected by a mass spectrometry unit (363) and analyzed by an analytical
result analyzing unit (371). The analytical result is stored in a memory
(369) while associated with position information in a driver control unit
(367) and information on laser beam irradiation condition in a laser
control unit (373), and the analytical result is imaged by an imaging
unit (375). The imaged analytical result is displayed on a display (377).