To provide a mold apparatus for injection molding and a method for injection molding capable of preventing a deformation of a molding by uniformly holding a mold release balance in the case of releasing the molding by alleviating a close contact force between the molding and a mold.

The method for injection molding comprises the steps of measuring the close contact force between the molding 23 and a dowel 35 of a movable mold in the case of releasing the molding 23, and vibrating the dowel 35 by vibrating units 24 and 25 based on a measured result of the force.