To provide a cutting blade fixing bolt making it easier to remove crushed matters got stuck in a tool hole of the fixing bolt for fixing the cutting blade.

The cutting blade fixing bolt 1 for fixing a plurality of split type cutting blades 105 to a blade base includes a shank 3 formed with a male screw 2 engaged with a female screw formed in the blade base; and a head 4 formed at one end of the shank 3. The head 4 has the tool hole 5 for fixing or relaxing on the side opposite to the shank. The tool hole 5 has a recess-shaped crushed matter removal groove 7 extending from the upper end thereof in the depth direction thereof around a tool insertion portion.