An injection molding machine comprising: a toggle mechanism which connects a movable platen and a rear platen to each other, wherein the toggle mechanism includes a plurality of links (151, 152, 153, 154), a first connectionportion which connects the movable platen and the link (151, 152, 153, 154) to each other, a second connection portion which connects the links (151, 152, 153, 154) to each other, and a third connection portion which connects the rear platen and the link (151, 152, 153, 154) to each other, characterized in that at least one connection portion of the first to third 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), a discharge path (67, 68) through which the lubricant is discharged from the bearing clearance, and a circumferential supply promotion mechanism which promotes a supply of the lubricant supplied from an opening portion on the bearing clearance side of the supply path (62, 63) to the bearing clearance, in a circumferential direction of the connection pin (50, 51, 52, 53, 54), the circumferential supply promotion mechanism is a plurality of the supply path opening portions which are provided in the circumferential direction of the connection pin (50, 51, 52, 53, 54), and the supply path opening portions are provided on an outer peripheral surface of the connection pin (50, 51, 52, 53, 54) and are provided to sandwich a movable range of the connection portion when viewed in the circumferential direction of the connection pin (50, 51, 52, 53, 54). a toggle mechanism which connects a movable platen and a rear platen to each other, wherein the toggle mechanism includes a plurality of links (151, 152, 153, 154), a first connectionportion which connects the movable platen and the link (151, 152, 153, 154) to each other, a second connection portion which connects the links (151, 152, 153, 154) to each other, and a third connection portion which connects the rear platen and the link (151, 152, 153, 154) to each other, characterized in that at least one connection portion of the first to third 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), a discharge path (67, 68) through which the lubricant is discharged from the bearing clearance, and a circumferential supply promotion mechanism which promotes a supply of the lubricant supplied from an opening portion on the bearing clearance side of the supply path (62, 63) to the bearing clearance, in a circumferential direction of the connection pin (50, 51, 52, 53, 54), the circumferential supply promotion mechanism is a plurality of the supply path opening portions which are provided in the circumferential direction of the connection pin (50, 51, 52, 53, 54), and the supply path opening portions are provided on an outer peripheral surface of the connection pin (50, 51, 52, 53, 54) and are provided to sandwich a movable range of the connection portion when viewed in the circumferential direction of the connection pin (50, 51, 52, 53, 54).