A bottle container, comprising a mouth part (1) for discharging contents and, continuously therewith, a shoulder part (2), a drum part (3), and a bottom part (4) formed integrally with each other, wherein an annular projected part (5) surrounding the drum part (3) and projected from the surface thereof is provided in the boundary between the shoulder part (2) and the drum part (3), and annular small grooves (6a, 6b) are disposed on both sides of the annular projected part (5) along the annular projected part.
