An injection molding machine comprising: a movable platen; a rear platen; a link mechanism which has a plurality of links (151, 152, 153, 154), one end connected to the movable platen, and the other end connected to the rear platen; a lubricant supply device which supplies a lubricant to at least one connection portion of a connection portion which connects the movable platen and the link (151, 152, 153, 154) to each other, a connection portion which connects the links (151, 152, 153, 154) to each other, and a connection portion which connects the rear platen and the link (151, 152, 153, 154) to each other; and a controller configured to control the lubricant supply device, wherein at least one connection portion of the connection portions includes a bush, a connection pin (50, 51, 52, 53, 54) which is inserted into the bush, a supply path (62, 63) through which a lubricant is supplied to a bearing clearance which is a clearance between the bush and the connection pin (50, 51, 52, 53, 54), and a discharge path (67, 68) through which the lubricant is discharged from the bearing clearance, wherein the lubricant supply device includes a supply mechanism which is connected to the supply path (62, 63) and supplies the lubricant, and a discharge mechanism which is connected to the discharge path (67, 68) and discharges the lubricant, wherein the controller is configured to perform a lubricant supply process in which the supply mechanism is operated to supply the lubricant to the bearing clearance before a molding cycle process in which injection molding is performed is performed, wherein the link mechanism is a mechanism which moves a first mold to be close to or away from a second mold in a direction of the second mold so as to perform mold closing, mold clamping, and mold opening, the injection molding machine being characterized in that the controller is configured to operate the link mechanism within a range in which the first mold and the second mold are separated from each other in the lubricant supply process. a movable platen; a rear platen; a link mechanism which has a plurality of links (151, 152, 153, 154), one end connected to the movable platen, and the other end connected to the rear platen; a lubricant supply device which supplies a lubricant to at least one connection portion of a connection portion which connects the movable platen and the link (151, 152, 153, 154) to each other, a connection portion which connects the links (151, 152, 153, 154) to each other, and a connection portion which connects the rear platen and the link (151, 152, 153, 154) to each other; and a controller configured to control the lubricant supply device, wherein at least one connection portion of the connection portions includes a bush, a connection pin (50, 51, 52, 53, 54) which is inserted into the bush, a supply path (62, 63) through which a lubricant is supplied to a bearing clearance which is a clearance between the bush and the connection pin (50, 51, 52, 53, 54), and a discharge path (67, 68) through which the lubricant is discharged from the bearing clearance, wherein the lubricant supply device includes a supply mechanism which is connected to the supply path (62, 63) and supplies the lubricant, and a discharge mechanism which is connected to the discharge path (67, 68) and discharges the lubricant, wherein the controller is configured to perform a lubricant supply process in which the supply mechanism is operated to supply the lubricant to the bearing clearance before a molding cycle process in which injection molding is performed is performed, wherein the link mechanism is a mechanism which moves a first mold to be close to or away from a second mold in a direction of the second mold so as to perform mold closing, mold clamping, and mold opening, the injection molding machine being characterized in that the controller is configured to operate the link mechanism within a range in which the first mold and the second mold are separated from each other in the lubricant supply process.