PROBLEM TO BE SOLVED: To provide a direct blow-molded olefin-based resin bottle in which the slip drop property on an inner surface of its bottom part to an oily content such as mayonnaise is improved.SOLUTION: In the olefin-based resin bottle which is direct blow-molded while at least its inner surface is formed of an olefin-based resin, the lower end of the barrel part wall of the bottle forms a circumferential ground contact surface including a ground contact part when the bottle is held upright, at least one raised bottom part higher than the circumferential ground contact surface is provided on a bottom wall surrounded by the circumferential ground contact surface, the inner surface of an inclined wall descending from the raised bottom part includes a slip drop area which is orthogonal to the inclined wall while the angle of inclination of the tangent to the inclined wall to the horizontal plane at the vertical section orthogonal to the inclined wall and orthogonal to the horizontal plane is ≥37°, and the projected surface of the slip drop area occupies ≥30% of the projected area when the bottom wall is projected on the horizontal plane including the circumferential ground contact surface.
