A grinding machine for welding electrodes comprises a housing 1, grinder motor 2, grinding disk 3, swing plate 4, holder guide 6, electrode holder 7, electrode turning motor 8 and swing plate moving mechanism 9.The axis φa of electrode A extends along a line perpendicular to the axis φ of motor drive shaft 2 a and first grinding part 3 a of the grinding disk is formed to conform to the ...