A liquid storage container includes a liquid storage portion configured and arranged to store liquid, and a liquid supply portion having a liquid supply flow path provided to supply the liquid in the liquid storage portion to a liquid ejecting apparatus. The liquid storage container further includes a filter unit arranged inside of the liquid storage portion and connected to the liquid supply portion. The filter unit has a first opening connecting to the liquid supply flow path, a second opening connecting to an interior of the liquid storage portion, a connection flow path connecting the first opening and the second opening, a filter chamber arranged in the connection flow path with a filter being installed in the filter chamber, and a low pressure chamber connecting to the interior of the liquid storage portion at a different position from the connection flow path and having pressure lower than atmospheric pressure.