To transfer a pallet even when a length between the machine tools is long, by comprising a rotary frame which can be placed in the direction to bridge the machine tools, and the direction to be stored in one side of the machine tools.

An arm pedestal 6 supports a supporting arm 4 in such manner that a rotary frame 1 is supported in a direction to bridge the machine tools, that is, the rotary frame 1 is oriented in such manner that a conveying rail 2 on a connection face of the rotary frame 1 is placed at a height same as the upper faces of the transfer tables 14, 22. Then a pallet on which a work machined by one of the machine tools, is sent to the transfer table 14, is moved on the conveying rail 2 on the rotary frame 1, and is sent onto the transfer table 22 to be transferred to the machine tool of the next process.