In accordance with the present invention, a liquid agent container includes the containers main unit (1), a cap (2), an intermediate member (3), and an internal stopper (4). The cap (2) is provided with a liquid agent discharging path (25) and an air introducing path (28). The intermediate member (3) has a tube (35) projecting toward the interior of the main unit (1). Between a liquid agent introducing path (34) and the liquid agent discharging path (25) a hydrophilic filter (29) is provided, and between an air supplying path (36) communicating with the air introducing path (28) and an air delivering path (43) a filter (37) is provided. The air delivering path (43) communicates with the interior of the main unit (1) via a check valve, with an annular valve (42) having an inner circumferential surface in contact with an outer circumferential surface of the tube (35), to pass air only in a direction toward the interior of the main unit (1). The present invention can provide a liquid agent container including a check valve readily fabricated and ensuring preventing a liquid agent from flowing back.
