PROBLEM TO BE SOLVED: To provide a groundbreaking slurry injector used for specimen evaluation that exhibits an unprecedented action effect. SOLUTION: A slurry injector is used for specimen evaluation for injecting slurry 3 obtained by mixing abrasive grain 1 and liquid 2 with compression air 5 to a specimen 20 at a high speed to evaluate the specimen 20. The slurry injector includes a slurry supply unit 4 that supplies the slurry 3, a compression air supply unit 6 that supplies the compression air 5, and a nozzle unit 8 that injects the slurry 3 accelerated by the compression air 5. COPYRIGHT: (C)2013,JPO&INPIT