PROBLEM TO BE SOLVED: To provide a ridge coating machine that includes means for detachably holding an extension upper ridge-forming part.SOLUTION: A ridge coating machine includes: a slope ridge-forming part configured by connecting two or more slope face blade plates in the circumferential direction, and ridge-forming the slope face of a ridge by the rotation around a shaft; an upper ridge-forming part with a proximal end fixed at the top of the slope ridge-forming part, and ridge-forming the upper surface of the ridge by the rotation; and holding means for storing and holding an extension upper ridge-forming part removable to the upper ridge-forming part. Preferably, the holding means may have a cutout part where a hook member extending from the bottom surface of the extension upper ridge-forming part toward the holding means comes in, while fitting the extension upper ridge-forming part to the holding means, and an engaging edge of the cutout part where the hook member is engaged by turning and operating
