Slide apparatus for vehicle and rolling element circulation unit for the same

A slide apparatus for a vehicle includes first and second rails (10, 20) and a rolling element circulation unit (40) including first and second cases (41, 42) and a plurality of rolling elements (43) accommodated within a receiving portion that includes first and second annular receiving portions (41 b) accommodating the rolling elements annularly arranged in a rolling and circulating manner. The second case includes elongated bores (42d) connected to the first and second annular receiving portions in a state where the second case is mounted at the second rail. A portion of the rolling elements is exposed from the elongated bores while being inhibited from disengaging from the elongated bores. The rolling elements exposed from the elongated bores make contact with an operating surface (12b) of the first rail and inner surfaces of the first and second annular receiving portions, and roll and circulate in association with a relative movement between the first and second rails.