The invention discloses a chamfer tool which comprises a tool body, wherein a holder is arranged at the rear end of the tool body, two oppositely arranged cutting blades, namely a first cutting blade and a second cutting blade, are arranged at the front end of the tool body, a chip space body is formed between the first cutting blade and the second cutting blade, chamber parts, namely a first chamber part and a second chamber part, are arranged on the first cutting blade and the second cutting blade respectively, a first chamber rear corner and a second chamber rear corner are arranged at the rear end of the first chamber part, and a third chamber rear corner, a fourth chamber rear corner and a fifth chamber rear corner are arranged at the rear end of the second chamber part. According to the way, the chamber tool provided by the invention can solve problems on aspects of processing efficiency and high-gloss surfaces, one blade is used for processing high-gloss surfaces, the other blade is used for chambering, one-step formation is achieved, the problems on the aspect of processing efficiency can be solved, and control to vibration of the tool is facilitated.