Abstract: A method of producing a mold for a microlens array with a cutting tool rotating around a rotation axis, microlenses having the substantially same shapes. A z-axis of an (x, y, z) coordinate system is in the direction of the central axis of a surface of the mold. The method includes the steps of cutting a surface of the mold while each of angle ? between the rotation axis of the cutting tool and a straight line passing through a point on the rotation axis and parallel to the z-axis and angle ? of a plane containing the rotation axis and the straight line around the straight line is kept constant; and cutting the plural surfaces while the values of angle ? and angle ? are determined such that a variance of the values of at least one of angle ? and angle ? is greater than a predetermined value.