To provide a method for dividing a workpiece, with which chipping produced at the side face of a chip having a quadrangular prism-like shape can be restrained during cutting work.

The method for dividing the workpiece W for dividing the workpiece W into chips each having a quadrangular prism-like shape, by cutting the workpiece stuck onto a substrate S by wax H by a cutting blade, includes: a first cutting step of cutting the workpiece W twice or more in parallel in a first direction to divide the workpiece W into strip-like pieces Ws each having the same width as that of the chip; a strip-like piece sideways moving step of moving the strip-like pieces Ws in a state where the wax H is melted to make the adjacent strip-like pieces Ws abut on one another and moving all of the strip-like pieces Ws sideways without a gap; and a second cutting step of cutting the abutted strip-like pieces Ws twice or more times in parallel in a second direction orthogonal to the first direction to divide the workpiece W into chips each having the quadrangular prism-like shape, after the strip-like piece sideways moving step.