A liquid condiment container (1) includes a bottle (10) and a cap (20). A condiment to be filled into the liquid condiment container (1) is a liquid condiment having a viscosity of from 5 Pa·s to 500 Pa·s, and the container has an initial volume of from 100 cm 3 to 700 cm 3 . The bottle (10) includes a mouth (11), a body (12), and a bottom (14). The body (14) has a flat shape in horizontal transverse section in an elected state, the flat shape having a short axis Q and a long axis R that are orthogonal to a center axis X of the bottle (10). The bottle (10) is made of low-density polyethylene as a main component. The bottle (10) has an inner pressure of from -1.0 kPa to -3.0 kPa after 30 seconds from suction of air in the bottle, the air being sucked by 10% of the initial volume from a state in which the bottle (10) is completely filled with the air. Accordingly, the bottle is flexibly deformed to easily discharge its content even when the content is a high-viscosity liquid condiment, and the original aesthetic appearance of the container is less liable to be impaired even when the content is reduced.
