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.