A drill (1) is equipped with a body (10) and a head (30). The body (10) comprises cemented carbide and the head (30) comprises PCD. Spiral coolant passages (17, 18) are provided inside the body (10). Oil holes (25, 26) are provided in the body-side joint surface of the body (10). The oil holes (25, 26) are the outlets of the coolant passages (17, 18). The coolant passages (37, 38) provided inside the head (30) extend from the oil holes (45, 46) provided at the tip (31) toward the rear end (32). The head-side joint surface of the head (30) is joined to the body-side joint surface. Two oil holes are provided in the head-side joint surface. The two oil holes are the inlets of the coolant passages (37, 38) and communicate with the oil holes (25, 26) in the body-side joint surface.