A liquid ejection device includes a medium set section that is configured to set a medium, a support section that is configured to support the medium, a recording section that ejects ink onto the medium supported by the support section to record, a liquid container mounting section to which a liquid container that contains the ink to be supplied to the recording section is attached, and a waste liquid container mounting section to which a waste liquid container that stores ink discharged as waste liquid from the recording section is attached, wherein the liquid container mounting section and the waste liquid container mounting section are provided at position below the support section and overlap with the medium set section as viewed from a direction along a transport direction in which the medium is transported in the support section.