To provide a wire saw which can prevent the drop of a maching accuracy and machining efficiency and also replace the roller for machining to the roller with a different inter-shaft distance simply.

Plural rollers 15, 16, 17 for machining are supported by a fixed frame 14 and support frame 22 and a wire row 18 is stretched between these rollers 15-17 for machining. Out of plural rollers 15-17 for machining, the roller 15 for machining of the drive side connected to a motor is left and the rollers 16, 17 for machining of the driven side corresponding to the work 21 are supported by a support frame 22 and the support frame 22 is mounted so as to be attached/detached and replaced for the fixed frame 14.