To provide an injection molding machine and method for controlling the same having a core block moving mechanism for preventing a device, e.g. mold, from occurring any unexpected trouble, when a core block is operated in the injection molding machine having the core block moving mechanism in which the core block forming a cavity forming surface is movably provided.

In the injection molding machine 11 having a core block moving mechanism 30 in which a core block 35 forming a part of a cavity forming surface 51 of a mold 46 for molding is movably provided, the core block moving mechanism 30 is changeably provided with ahead power of the core block 35.