Liquid sealing box and liquid feeding method

The invention provides a liquid sealing box which can restrain the load of a pressing device and restrain the damage of the inner bottom surface of the liquid sealing box. The liquid sealing box (100)comprises a liquid storage part (10) for storing liquid (90); a flow path (20) through which the liquid (90) stored in the liquid storage unit (10) flows; a liquid sealing part (30) for sealing the liquid (90) in the liquid storage part (10), wherein the liquid seal part (30) has an outer peripheral part (33) and a center-side low-strength part (31) on the center side with respect to the outer peripheral part (33), and after being pressed, the center-side low-strength part (31) is broken, and the liquid (90) in the liquid storage part (10) can be caused to flow through the flow path (20). 本发明提供了一种能够抑制进行按压的装置的负荷且抑制液体密封盒的内底面的破损的液体密封盒。该液体密封盒（100）包括：液体存放部（10），存放液体（90）；流路（20），供液体存放部（10）中存放的液体（90）流动；液体密封部（30），密封液体存放部（10）的液体（90）；其中，液体密封部（30）具有外周部（33）和相对于外周部（33）而言的中央侧的中央侧低强度部（31），被按压后中央侧低强度部（31）断裂，能使液体存放部（10）的液体（90）向流路（2