A roller mill comprising: a rotary table that is arranged to rotate about a drive shaft by a driving force from a drive unit ; a fuel supply unit that is arranged to supply solid fuel (S) to the rotary table ; and a roller that is arranged to rotate about a rotating shaft by being pressed against a grinding surface of the rotary table and grind the solid fuel (S) along with rotation of the rotary table ; wherein a first position (P1) where an outer peripheral surface of the roller and the grinding surface of the rotary table come into contact with each other and a circumferential velocity of the outer peripheral surface equals a circumferential velocity of the grinding surface is located further to an inner circumferential side of the rotary table than a second position (P2) where the outer peripheral surface and the grinding surface come into contact with each other at a center position in a width direction of the roller , wherein a radius of curvature (R0) of the outer peripheral surface of the roller is constant, wherein a first radius of curvature (R1) of the grinding surface at a third position (P3) corresponding to an end surface of the roller on the inner circumferential side of the rotary table is less than a second radius of curvature (R2) of the grinding surface at a fourth position (P4) corresponding to an end surface of the roller located on an outer circumferential side of the rotary table , and wherein a distance (D) in the rotating shaft direction from the first position (P1) to the third position (P3) is within 0.3 times, preferably within 0.15 time a width (W) of the roller . a rotary table that is arranged to rotate about a drive shaft by a driving force from a drive unit ; a fuel supply unit that is arranged to supply solid fuel (S) to the rotary table ; and a roller that is arranged to rotate about a rotating shaft by being pressed against a grinding surface of the rotary table and grind the solid fuel (S) along with rotation of the rotary table ; wherein a first position (P1) where an outer peripheral surface of the roller and the grinding surface of the rotary table come into contact with each other and a circumferential velocity of the outer peripheral surface equals a circumferential velocity of the grinding surface is located further to an inner circumferential side of the rotary table than a second position (P2) where the outer peripheral surface and the grinding surface come into contact with each other at a center position in a width direction of the roller , wherein a radius of curvature (R0) of the outer peripheral surface of the roller is constant, wherein a first radius of curvature (R1) of the grinding surface at a third position (P3) corresponding to an end surface of the roller on the inner circumferential side of the rotary table is less than a second radius of curvature (R2) of the grinding surface at a fourth position (P4) corresponding to an end surface of the roller located on an outer circumferential side of the rotary table , and wherein a distance (D) in the rotating shaft direction from the first position (P1) to the third position (P3) is within 0.3 times, preferably within 0.15 time a width (W) of the roller . <EOS>