To provide a laser processing system capable of having no waiting time for exchanging a processed work with an un-processed work with regard to a pallet for processing, and processing a plurality of works consecutively, and also improving operation efficiency.

A pair of pallets 23A and 23B provided for processing are arranged in tiers, and are alternately moved to a position P1 for work changing and a position P2 for processing by means of a moving mechanism 24. In a state that one of the pallets 23A and 23B is moved to the position P2 for processing, laser is irradiated to the work 22 located on the pallets 23A and 23B by a laser processing apparatus 25. In a state that the other pallets 23A and 23B is moved to the position P1 for work changing during processing of the work 22, an exchange between the processed work 22 and the un-processed work 22 are exchanged with each other by a work changing mechanism 26 with regard to the pallets 23B and 23A provided for processing.