An adhesive matter cutting and removing method for removing adhesive matter remaining on the upper and lower surfaces of the longitudinal end of a continuously cast slab by corner removing cutting, comprising: measuring distances of the upper surface and the lower surface of the continuously cast slab from a reference position using a distance measurement means in the longitudinal direction of the continuously cast slab including the longitudinal end of the continuously cast slab; comprehending on the basis of the measurement results the state of remaining of adhesive matter remaining on the upper and lower surfaces of the longitudinal end of the continuously cast slab; determining on the basis of the state of remaining of adhesive matter the amount and position of cutting by a cutting tool; and performing corner removing cutting on the upper and lower surfaces of the longitudinal end of the continuously cast slab using the cutting tool in accordance with the determined amount and position of cutting, wherein the comprehending of the state of remaining of the adhesive matter is performed by determining a reference line of the upper surface and the lower surface of the continuously cast slab on the basis of distribution of distance of the upper surface and the lower surface of the continuously cast slab from the reference position measured over a predetermined length or more in the longitudinal direction of the continuously cast slab then determining a corner position of the continuously cast slab from this reference line and the distribution of distance, and determining a position at which the distance is smaller than the distance from the reference line by a predetermined value or more to be a place where adhesive matter remains, and the amount and the position of cutting by the cutting tool are determined on the basis of the distance of the place where adhesive matter remains from the end of the continuously cast slab and the corner position. measuring distances of the upper surface and the lower surface of the continuously cast slab from a reference position using a distance measurement means in the longitudinal direction of the continuously cast slab including the longitudinal end of the continuously cast slab; comprehending on the basis of the measurement results the state of remaining of adhesive matter remaining on the upper and lower surfaces of the longitudinal end of the continuously cast slab; determining on the basis of the state of remaining of adhesive matter the amount and position of cutting by a cutting tool; and performing corner removing cutting on the upper and lower surfaces of the longitudinal end of the continuously cast slab using the cutting tool in accordance with the determined amount and position of cutting, wherein the comprehending of the state of remaining of the adhesive matter is performed by determining a reference line of the upper surface and the lower surface of the continuously cast slab on the basis of distribution of distance of the upper surface and the lower surface of the continuously cast slab from the reference position measured over a predetermined length or more in the longitudinal direction of the continuously cast slab then determining a corner position of the continuously cast slab from this reference line and the distribution of distance, and determining a position at which the distance is smaller than the distance from the reference line by a predetermined value or more to be a place where adhesive matter remains, and the amount and the position of cutting by the cutting tool are determined on the basis of the distance of the place where adhesive matter remains from the end of the continuously cast slab and the corner position.