To prevent a liquid absorbed to a waste liquid absorption member from leaking therefrom.

This liquid jet device 10 comprises a plane shaped waste liquid absorption member 300 provided under a plurality of nozzle arrays each for ejecting a liquid on a recording medium 20, and an absorption member holding section 400 which has ribs 422, 432 penetrating the waste liquid absorption member 300 from the lower section to the upper section thereof provided to a portion in a scanning region of a plurality of nozzles and holds the waste liquid absorption member 300. The waste liquid absorption member 300 has absorption member legs 340, 350 which are formed such that each of rib penetration regions where the respective ribs 422, 432 penetrate is cut to be bent downwardly by leaving one end thereof. Each of the absorption member legs 340, 350 has a length whereby a pressure which is greater than a liquid absorption property of the absorption member legs 340, 350 is generated at the lower face of each of the absorption member legs 340, 350 because of the height from the upper face of each of the absorption member legs 340, 350.