To provide an insert molding method for a connector which enables terminals to be inserted easily into insertion destination places for the terminals. An insert-molding method for insert molding a connector 1 equipped with a plurality of terminals 10 integrated with a housing 40 and aligned in two rows, includes setting the plurality of terminals 10 in a housing mold 80 to uniform warping directions D of the terminals 10 so that the warping directions D are respectively directed toward outer sides of the rows of the terminals 10.