The present invention relates to a Co-Cr based dental alloy having outstanding cutting processability, oxidation resistance, corrosion resistance and aesthetics whereby it is possible to ensure outstanding oxidation resistance, in addition to having an appropriate elongation percentage while also having high strength. According to the present invention, the Co-Cr based dental alloy having outstanding cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the present invention comprises Cr: 22 to 29 wt.%, Al: 2 to 6.5 wt.%, Y: 0.05 to 1.5 wt.%, Si: 1 to 3 wt.% and the remainder is Co, and may also contain Mo: 1 to 9 wt.%.
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