To provide a polishing machine convenient in use allowing easy mounting of sand paper.
This polishing machine is constituted by rotatably supporting a linear spring (elastic body) 2 for press-contacting and holding the sand paper 5 on a polishing plate 1 on the polishing plate 1. An oblique face 8 for forming an acute angle with the face of the polishing plate 1 is formed on the end face of the polishing plate 1. The sand paper 5 is nipped by the spring 2 and the face of the polishing plate 1. A recessed groove 6 to which the spring 2 is fitted is provided on the oblique face 8.