Liquid chromatograph device and bubble removal method for liquid chromatograph device

According to the liquid chromatograph device, bubbles can be removed in the preparation action process when the device is started, and complex work is not needed. A syringe (53) for injecting a sample into the solvent delivered from the liquid delivery pump (1); a separation column (54) for supplying the solvent and the sample through the syringe (53) and separating the sample by component; a detector (55) for detecting the component supplied from the separation column (54); and a pressure sensor (51) for measuring the pressure in the solvent flow path of the liquid delivery pump (1). And a controller (50) that controls the operation of the liquid delivery pump (1). The controller (50) controls a purge operation, which is an operation for removing air bubbles in the solvent flow path by the liquid delivery pump (1), determines whether or not the amount of pressure change in the solvent flow path measured by the pressure sensor (51) during the purge operation is equal to or greater than a predetermined amount