To provide a work table provided with a contaminated gas purifying device.

A frame 5 provided with a table 10 equipped with a number of suction ports 7 on its upper portion is internally provided with a photocatalyst housing part 25 housing a photocatalyst for decomposing a contaminated gas in the air and an adsorbent housing part 27 for housing an adsorbent for adsorbing the contaminated gas in the air, an air jet-out part 43 to jet out air passed through the adsorbent housing part 27 from above the table 10 to down is provided to the frame 5, an air blower 17 is provided for circulating the air sucked through the suction ports 7 to the photocatalyst housing part 25, the adsorbent housing part 27 and the air jet-out part 43, and the photocatalyst housing part 25 locates photocatalyst holders 53 between a light transmissible inner cylinder 47 internally equipped with a light source 45 and an outer cylinder 49 surrounding the inner cylinder 47 and forms an inner surface of the outer cylinder 49 into reflection plane for reflecting inwards the light transmitted between the respective photocatalyst holders 53.