An injection molding machine includes a safety door and a guide for slidably guiding the safety door in a direction of opening and closing a mold of the injection molding machine. The guide includes: a first guide part fixed to a machine base of the injection molding machine; a second guide part arranged on the safety door's closing direction side of the first guide part and configured to be removable from the machine base; and a coupling configured to connect the first guide part and the second guide part so that the second guide part can be moved onto the first guide part.