To provide a blow-molded plastic infusion container capable of being kept upright, which has almost no dead space in a shoulder and in a bottom at the time of discharge of liquid (Accordingly, it is small in amount of air to be injected for removal of the residual liquid.). The blow-molded container has a mouth (1), a neck (2), a shoulder (3), a barrel (4) and a bottom section (5), among which the barrel (4) has a pair of wide sidewalls (41, 41) and a pair of narrow sidewalls (42, 42), and the bottom (5) is formed into a V-shape bent inwardly and symmetrically with respect to the long axis of the bottom. Also, the shoulder (3) has a pair of wide sidewalls (31, 31) and a pair of narrow sidewalls (32, 32). The narrow sidewalls are provided with grooves which are formed into a V-shape bent inwardly and symmetrically with respect to the long axis of the bottom.
