To provide an erasing device for a thermally reversible recording medium wherein an erasing/heating means such as a heating roller can be cleaned, charging thereto can be prevented and sticking of dust and destruction of a thermal head due to static electricity can be prevented in a simple structure.

A coating means 500 for coating a silicone oil on an erasing/ heating means such as a heating roller 1 is provided. In the coating means, a holding section 502 holds a brush 501. A pair of elastic members 504 are fixed to both of end sections of the erasing/heating means, respectively. The pair of elastic members 504 are respectively engaged with recess sections 503a of both of end arm sections 503 of the holding section 502, thereby making the coating means 500 to be detachable to the heating roller 1.