A combinatorial weighing method for combinatorially weighing out articles supplied to a plurality of weighing machines includes the step of making a comparison between a predetermined percentage of a set target weight value and a sum total of weight values from weighing machines that have participated in a combinatorial weighing operation. This step is performed when an optimum combination is not obtained through a combinatorial calculation. Based on the results of the comparison, weighing machines indicating comparatively low weight values are supplied with additional articles. In another embodiment, the combinatorial weighing method includes the steps of executing combinatorial weighing using a number of weighing machines greater than a prescribed number, deciding on the basis of the sum total of the weight values from weighing machines that have participated in the combinatorial weighing operation whether to perform a combinatorial calculation one or more times, and changing over automatically between high-speed, low-capacity processing and low-speed, high-capacity processing in dependence upon the amount of articles supplied.