Tool post for machine tools

A tool post for machine tools, the tool post comprising:

• a turret provided on an outer periphery thereof with a plurality of tool holder mounting surfaces on which a plurality of types of tool holders and are mounted, the turret configured to be indexed by rotation to a designated position;
• and a tool post body configured to rotatably support the turret,
• the tool post characterized in that, on each of the tool holder mounting surfaces of the turret, one end of each of a plurality of fluid connection passages configured to allow supply of fluid is made open, and the turret and the tool post body are provided with fluid supply mechanisms and configured to supply the fluid to each of the fluid connection passages, and
• an actuator, which uses the fluid supplied through each of the fluid connection passages as a driving source, is configured to be mountable on the turret.