An intermediate mold disposed between a stationary side mold and a movable side mold in a mold unit of an injection molding machine includes: a mold section performing mold opening and closing operations with a facing mold of the stationary side mold and the movable side mold; a rotating frame body rotated together with the mold section by a rotary shaft; a support section supporting both sides of the rotating frame body via shaft bodies; and a rotation drive section transmitting a rotational force to the rotating frame body, in which the mold section and the shaft bodies include a hollow portion that allows a pipe through which a fluid passes or an electrical wire to be disposed, and both end portions of the hollow portion form inlet/outlet ports through which the pipe or the electrical wire can enter and exit in a rotation axis direction of the shaft bodies.