To provide a PET bottle cutting device finely cutting a PET bottle in a chip shape.

This PET bottle cutting device has: compression parts 32 and 33 composed of a pair of compression rollers 32A, 32B (33A, 33B) for compressing the thrown PET bottle by rotating in the mutually different directions; a first cutting part 33 composed of a pair of cutting rollers 33A and 33B for cutting the PET bottle compressed by the compression parts 32 and 33 by rotating in the mutually different directions; and a second cutting part 34 composed of a pair of cutting rollers 34A and 34B for cutting the PET bottle cut by the first cutting part 33 by rotating in the mutually different directions. The cutting device is characterized by arranging the cutting rollers 34A and 34B of the second cutting part 34 in a right-angled position to the cutting rollers 33A and 33B of the first cutting part 33.