To provide a disc blade grinding device which grinds a disc blade with ease, facilitates adjustment in contact angle between the disc blade and a grinding wheel, and is low in manufacturing costs.

This disc blade grinding device is formed out of a disc blade fixing stand 14 fixing a disc blade 12 at an axial center part, a set angle rotation means 16 rotating the disc blade 12 fixed to the disc blade fixing stand 14 every set angle in one direction, a grinding device 20 having a grinding wheel 18 to be rotationally driven, a link mechanism 22 mutually separating or approaching the grinding device 20 from or to the disc blade 12 while being interlocked with the rotation of a set angle driven by the set angle rotation means 16, and with a supporting body 21 (supporting member and grinding device supporting member) making adjustment in contact angle between the disc blade 12 and the grinding wheel 18 while no adjustment in position is made between the grinding wheel 20 and the disc blade 12.