Workpiece support device

A workpiece support device for supporting a workpiece as an object to be machined, comprising:

• a jig having a main flow path to flow a fluid required for machining and a sub-flow path different from the main flow path, and to fix the workpiece;
• a table having a table flow path to communicate with the main flow path, and being attached with the jig;
• a rotating shaft having a rotating shaft flow path to communicate with the table flow path, and being connected to the table;
• a support member supporting the rotating shaft during rotation;
• a flow path connector connecting the rotating shaft flow path of the rotating shaft with a fluid-supply path to communicate with a fluid-supply side so as to relatively rotate the rotating shaft flow path and the fluid-supply path about an axis of the rotating shaft;
• and
• a supply-side connecting portion moving relative to the jig to communicate with and to block off the sub-flow path, and flowing a supplied fluid.