A liquid ejection device includes a transport section configured to transport a medium along a first axis, a liquid ejection section configured to eject a liquid to the medium, a housing that houses the transport section and the liquid ejection section, a fan disposed at an end section of the housing along a second axis, which intersects the first axis of the housing, and that feeds air into the housing, a flow path member in which are formed an opening along the second axis and a flow passage for guiding air that was fed by the fan, a first partition plate disposed in the flow path and configured to guide, toward the opening, air fed along the second axis, and a second partition plate disposed in the flow path and configured to guide, toward the opening, air fed along the second axis.