To provide a clean bench in which the space on a working bench can be used effectively and danger such as environmental pollution can be avoided.

This clean bench 1 is provided with: a blower 11 for supplying clean air to a working space 6 through an air supplying high-performance filter 9; a communicative route 7 through which the air flowing out of the working space 6 is sucked by the blower 11; a partition plate 2 and the working bench 3 being the bottom surface of the working space which divide the communicative route 7 from the working space 6; discharge ports 12, 13 formed on the partition plate 2 for communicating the working space 6 with the communicative route 7; and a discharge route 14 arranged on the leeward side of the blower 11 for discharging the air in the clean bench to the outside through an air discharging high-performance filter 19. A waste liquid sucking vessel 40 is held on the partition plate 2 in a state kept away from the discharge ports 12, 13.