Provided is a base (30) used in an injection molding machine. The base (30) for an injection molding machine includes, two side frames (40) extending parallel with the axis of a drive actuator (16). Each of the side frames (40) includes a lower flange (44) supported by a bed (11), an upper flange (45) disposed parallel with the lower flange (44), at least two webs (46) connecting the upper flange (45) and the lower flange (44), and a web reinforcing member (47) fixed to the webs (46) while penetrating the webs (46).

An injection molding machine includes a connection member that connects a nozzle touch mechanism and a fixed platen. The connection member has: an arm part that rises upward from a support frame part on a side of the fixed platen; and a platen connection part that is provided on an upper section of the arm part and serves as a second connection section connected to the fixed platen. The platen connection part has: a connection pin that is fixed to the arm part and extends in a left-right direction coinciding with the width direction of a machine frame; and a rotary member that is fixed to the fixed platen and can rotate around the connection pin, wherein the connection pin is disposed so as to pass through the center axis of a nozzle and include a plane parallel to a mount surface of the machine frame.