A press forming method comprising the steps of: providing a press machine comprising a fixed plate, a slide plate disposed to face the fixed plate and movable relatively to the fixed plate and a plurality of drive sources (60a, 60b, 60c, 60d) each having a servo-motor for driving the slide plate and pressing each of a plurality of engaging portions (62a, 62b, 62c, 62d) positioned on the slide plate to press horizontally the slide plate, measuring a load working on each of the plurality of drive sources (60a, 60b, 60c, 60d) at each of descending displacements of the slide plate, while the slide plate is displaced to press-form a work-piece, applying the load at each of the descending displacements and a target speed for production forming for one (hereinafter referred to as "reference drive source") of the plurality of drive sources (60a, 60b, 60c, 60d) at each of the descending displacements to a function that shows a delay of a drive source-from an instructed displacement in terms of a speed of the drive source and a load working on the drive source, thereby calculating a speed (hereinafter referred to as "compensation speed") for each of the plurality of drive sources (60a, 60b, 60c, 60d) to eliminate a delay for each of the plurality of drive sources (60a, 60b, 60c, 60d) from the reference drive source, driving each of the plurality of drive sources (60a, 60b, 60c, 60d) at the compensation speed to press-form a work-piece in a trial forming, measuring a delay of each of the plurality of drive sources (60a, 60b, 60c, 60d) during the trial forming, until delays of other drive sources from the reference drive source become not more than a predetermined value, repeating correction of the compensation speed, the trial forming and the measurement of the delay during the trial forming, and when the delays of the other drive sources from the reference drive source become not more than the predetermined value, press-forming work-pieces at corrected respective speeds of the plurality of drive sources (60a, 60b, 60c, 60d) in a production forming, characterized in that said reference drive source is among the plurality of drive sources (60a, 60b, 60c, 60d) a drive source on which the smallest load works at each of the descending displacements. providing a press machine comprising a fixed plate, a slide plate disposed to face the fixed plate and movable relatively to the fixed plate and a plurality of drive sources (60a, 60b, 60c, 60d) each having a servo-motor for driving the slide plate and pressing each of a plurality of engaging portions (62a, 62b, 62c, 62d) positioned on the slide plate to press horizontally the slide plate, a fixed plate, a slide plate disposed to face the fixed plate and movable relatively to the fixed plate and a plurality of drive sources (60a, 60b, 60c, 60d) each having a servo-motor for driving the slide plate and pressing each of a plurality of engaging portions (62a, 62b, 62c, 62d) positioned on the slide plate to press horizontally the slide plate, measuring a load working on each of the plurality of drive sources (60a, 60b, 60c, 60d) at each of descending displacements of the slide plate, while the slide plate is displaced to press-form a work-piece, applying the load at each of the descending displacements and a target speed for production forming for one (hereinafter referred to as "reference drive source") of the plurality of drive sources (60a, 60b, 60c, 60d) at each of the descending displacements to a function that shows a delay of a drive source-from an instructed displacement in terms of a speed of the drive source and a load working on the drive source, thereby calculating a speed (hereinafter referred to as "compensation speed") for each of the plurality of drive sources (60a, 60b, 60c, 60d) to eliminate a delay for each of the plurality of drive sources (60a, 60b, 60c, 60d) from the reference drive source, driving each of the plurality of drive sources (60a, 60b, 60c, 60d) at the compensation speed to press-form a work-piece in a trial forming, measuring a delay of each of the plurality of drive sources (60a, 60b, 60c, 60d) during the trial forming, until delays of other drive sources from the reference drive source become not more than a predetermined value, repeating correction of the compensation speed, the trial forming and the measurement of the delay during the trial forming, and when the delays of the other drive sources from the reference drive source become not more than the predetermined value, press-forming work-pieces at corrected respective speeds of the plurality of drive sources (60a, 60b, 60c, 60d) in a production forming, characterized in that said reference drive source is among the plurality of drive sources (60a, 60b, 60c, 60d) a drive source on which the smallest load works at each of the descending displacements.