A printing machine that carries out printing while circulating a printing solution through a circulation route (10, 10') with a device for managing the printing solution, the printing solution containing a resin component to be transferred onto a surface to be printed and a surfactant, the device comprising: a liquid supplier that is configured to supply the printing solution containing foam generated in the circulation route (10, 10') with a viscosity adjusting solution for controlling the viscosity of the printing solution to break the foam, wherein: the circulating route (10, 10') comprises a tank that stores therein the printing solution and that is used for controlling therein the viscosity of the printing solution; characterized in that: the circulation route (10, 10') further comprises: a filter disposed at an entrance of the printing solution reclaiming to the tank; the filter being configured to catch the foam in the printing solution that flows into the filter and being configured to drop liquid-form components of the printing solution; wherein the liquid supplier comprises a spray nozzle that sprays the viscosity adjusting solution onto the printing solution containing the foam and being reclaimed in the filter; wherein the filter is installed in an auxiliary tank disposed at an upper portion of the tank; and the auxiliary tank comprises an ejector formed at a lower portion thereof, and through which the printing solution dropped through the filter flows into the tank. a liquid supplier that is configured to supply the printing solution containing foam generated in the circulation route (10, 10') with a viscosity adjusting solution for controlling the viscosity of the printing solution to break the foam, wherein: the circulating route (10, 10') comprises a tank that stores therein the printing solution and that is used for controlling therein the viscosity of the printing solution; characterized in that: the circulation route (10, 10') further comprises: a filter disposed at an entrance of the printing solution reclaiming to the tank; the filter being configured to catch the foam in the printing solution that flows into the filter and being configured to drop liquid-form components of the printing solution; the circulating route (10, 10') comprises a tank that stores therein the printing solution and that is used for controlling therein the viscosity of the printing solution; characterized in that: the circulation route (10, 10') further comprises: a filter disposed at an entrance of the printing solution reclaiming to the tank; the filter being configured to catch the foam in the printing solution that flows into the filter and being configured to drop liquid-form components of the printing solution; the circulation route (10, 10') further comprises: a filter disposed at an entrance of the printing solution reclaiming to the tank; the filter being configured to catch the foam in the printing solution that flows into the filter and being configured to drop liquid-form components of the printing solution; a filter disposed at an entrance of the printing solution reclaiming to the tank; the filter being configured to catch the foam in the printing solution that flows into the filter and being configured to drop liquid-form components of the printing solution; wherein the liquid supplier comprises a spray nozzle that sprays the viscosity adjusting solution onto the printing solution containing the foam and being reclaimed in the filter; wherein the filter is installed in an auxiliary tank disposed at an upper portion of the tank; and the auxiliary tank comprises an ejector formed at a lower portion thereof, and through which the printing solution dropped through the filter flows into the tank.