A container with an application tool includes a main body having a storage part for storing liquid substances and a neck part having a communicating port connected with the storage part; an application tool head axially movably connected to the neck part; a valve seat connected to the back end of application tool head; a partitioning wall partitioning the communicating port in the neck part; a valve body protruding forward from the partitioning wall having a lead-out hole; and an O-ring elastic member forming a water tight connection between a surface that supports the elastic member on the partitioning wall and the application tool head; wherein the elastic member urges the application tool head to separate the valve seat from the valve body; and the elastic member elastically deforms so that the valve seat contacts the valve body when the application tool head is pressed backward.