PURPOSE: To simplify a drilling process by forming a longitudinal T-slot at the middle on the upper face of a bed with casters, insertedly fitting a pair of V-blocks slidably into the T-slot to hold a workpiece by a clamping means, and severally attaching a dividing means to the block on one side and a drilling tool to the block on the other side.

CONSTITUTION: A T-slot 4 is formed at the middle on the upper face of a bed 1 having casters 3, and the insertedly fitting parts 6 of a pair of V-blocks 5-1, 5-2 are insertedly fitted into the T-slot 4 for attaching them slidably in a longitudinal direction. A dividing means 7 is arranged outside the V-block 5-2 to establish the position of a fixed dividing hole on the end side of a workpiece 8 positioned by the V-blocks 5-1, 5-2. A drilling tool 10 is mounted oppositely to the side of the V-block 5-1 through a supporting part 9 so that its height position may be adjusted. The workpiece 8 mounted on the V-blocks 5-1, 5-2 is fastened by a clamp 11.