A drilling machine comprising: a frame having a lower wall portion (20-2) removably attached to a workpiece to be subjected to drilling and a front wall portion (20-1) contiguous with the lower wall portion (20-2) and extending upward from the lower wall portion (20-2) to form an L-shape together with the lower wall portion (20-2), the frame being made of a metallic material; a drilling drive unit having a motor for rotationally driving a drilling tool , the drilling drive unit being attached to a front side of the front wall portion (20-1) so as to be vertically movable along the front wall portion (20-1) to bring the drilling tool toward and away from the workpiece, with the lower wall portion (20-2) secured to the workpiece; and a battery housing prepared separately from the frame and made of a resin material, the battery housing being attached to the frame to form a body unit of the drilling machine together with the frame , the battery housing having an intermediate wall portion (28-1) positioned directly above the lower wall portion (20-2) and extending apart from and parallel to the front wall portion (20-1) and a bottom wall portion (28-2) extending rearward from the intermediate wall portion (28-1), the intermediate wall portion (28-1) and the bottom wall portion (28-2) cooperating to define a battery accommodating space to removably receive a battery as a power source for driving the motor such that at least a portion of the battery accommodating space is positioned at a rear side of the front wall portion (20-1) and directly above the lower wall portion (20-2), the battery housing comprising a right-side part (22-1) and a left-side part (22-2), which are attached to the frame in such a manner as to sandwich the frame therebetween from right and left sides. a frame having a lower wall portion (20-2) removably attached to a workpiece to be subjected to drilling and a front wall portion (20-1) contiguous with the lower wall portion (20-2) and extending upward from the lower wall portion (20-2) to form an L-shape together with the lower wall portion (20-2), the frame being made of a metallic material; a drilling drive unit having a motor for rotationally driving a drilling tool , the drilling drive unit being attached to a front side of the front wall portion (20-1) so as to be vertically movable along the front wall portion (20-1) to bring the drilling tool toward and away from the workpiece, with the lower wall portion (20-2) secured to the workpiece; and a battery housing prepared separately from the frame and made of a resin material, the battery housing being attached to the frame to form a body unit of the drilling machine together with the frame , the battery housing having an intermediate wall portion (28-1) positioned directly above the lower wall portion (20-2) and extending apart from and parallel to the front wall portion (20-1) and a bottom wall portion (28-2) extending rearward from the intermediate wall portion (28-1), the intermediate wall portion (28-1) and the bottom wall portion (28-2) cooperating to define a battery accommodating space to removably receive a battery as a power source for driving the motor such that at least a portion of the battery accommodating space is positioned at a rear side of the front wall portion (20-1) and directly above the lower wall portion (20-2), the battery housing comprising a right-side part (22-1) and a left-side part (22-2), which are attached to the frame in such a manner as to sandwich the frame therebetween from right and left sides. <EOS>