A kind of chopping block sterilizing unit includes two support bodies, two grooves and an at least ultraviolet source. Each support body separately includes holding plane and side, wherein the holding plane of each support body arranges table top to place what one, it is slightly perpendicular between side and holding plane, and and there is a distance between the side of two support bodies. The direction of side towards the parallel cooking table top of the individual support bodies of what extends and opens up respectively for each groove system, wherein each groove one of two ends to set chopping block respectively. What support body surface is arranged in ultraviolet source, has an irradiating angle, is to define the irradiating angle that one is in 15 degree to 60 degree to arrange table top as original bench mark.一種砧板殺菌裝置,包含二個支架體、二凹槽及至少一紫外光源。每一支架體分別包含放置平面及側面,其中每一支架體之放置平面用以放置於一料理檯面,側面與放置平面之間略呈垂直,且二個支架體之側面之間具有一距離。每一凹槽係分別於個別支架體之側面朝平行料理檯面之方向延伸開設,其中各凹槽分別用以置砧板之二端部的其中之一。紫外光源設置於支架體表面,其具有一照射角度,係以料理檯面為起始基準,定義出一呈15度至60度之照射角度。