A processing machine line including multiple processing modules arranged in a width direction and loaded on a base where a machine body is movable in a front-rear direction; an automatic workpiece transfer machine to perform transferring of a workpiece by moving a conveyance robot in front of the base; an external cover to cover the processing module; a front cover to form a conveyance space of the conveyance robot, the front cover being provided with, for each processing module, an upper section cover that is open-and-closable in a lifting up manner, and a lower section cover configuring a cover front surface with the upper section cover; and a chip receiving box to be removable and attachable by being attached between the lower section cover and the base via an installation bracket that is attachable and removable with respect to a top section of the lower section cover.