A servo press machine including an eccentric shaft configured to be rotationally driven by a servomotor , a connecting rod configured to move upward and downward due to the rotational driving of the eccentric shaft , and a slide configured to move upward and downward as the connecting rod is configured to move upward and downward, the servo press machine comprising: an eccentric shaft-side sliding surface on which a press load during press working acts; a connecting rod-side sliding surface on which the press load acts and which is configured to slide with the eccentric shaft-side sliding surface ; an oil supply port configured to open on the connecting rod-side sliding surface and which is configured to supply a lubricant between the eccentric shaft-side sliding surface and the connecting rod-side sliding surface ; and a supply mechanism configured to supply the lubricant to the oil supply port , wherein the supply mechanism is configured to deliver the lubricant to the oil supply port and configured to pressure the lubricant during a press load period, in which the oil supply port is closed, by the connecting rod-side sliding surface or the eccentric shaft-side sliding surface on which the press load is acting, and the supply mechanism is configured to supply the pressurized lubricant between the eccentric shaft-side sliding surface and the connecting rod-side sliding surface from the oil supply port during a non-press load period in which the press load is not acting on the eccentric shaft-side sliding surface and the connecting rod-side sliding surface , characterized in that the connecting rod-side sliding surface is an inner circumferential surface of a sliding bearing interposed between the eccentric shaft and the connecting rod , and the oil supply port is formed on the sliding bearing . an eccentric shaft-side sliding surface on which a press load during press working acts; a connecting rod-side sliding surface on which the press load acts and which is configured to slide with the eccentric shaft-side sliding surface ; an oil supply port configured to open on the connecting rod-side sliding surface and which is configured to supply a lubricant between the eccentric shaft-side sliding surface and the connecting rod-side sliding surface ; and a supply mechanism configured to supply the lubricant to the oil supply port , wherein the supply mechanism is configured to deliver the lubricant to the oil supply port and configured to pressure the lubricant during a press load period, in which the oil supply port is closed, by the connecting rod-side sliding surface or the eccentric shaft-side sliding surface on which the press load is acting, and the supply mechanism is configured to supply the pressurized lubricant between the eccentric shaft-side sliding surface and the connecting rod-side sliding surface from the oil supply port during a non-press load period in which the press load is not acting on the eccentric shaft-side sliding surface and the connecting rod-side sliding surface , characterized in that the connecting rod-side sliding surface is an inner circumferential surface of a sliding bearing interposed between the eccentric shaft and the connecting rod , and the oil supply port is formed on the sliding bearing . <EOS>