A motor for use in a disk drive apparatus includes a bearing, a rotary unit, a stator, a thin flat base member, and a cylindrical holder extending in an axial direction. The base member includes a first through-hole, a peripheral edge portion, and a thin portion. The thin portion is located radially outward of the peripheral edge portion. The thin portion has an axial thickness smaller than an axial thickness of the peripheral edge portion. The holder includes a first protrusion portion and a second protrusion portion. The first protrusion portion extends radially outward and is located axially above the peripheral edge portion. The second protrusion portion extends radially outward and is located axially below the peripheral edge portion. The bearing is located inside the holder. A stator core is located radially outside the holder and axially above the thin portion.