To provide an extremely compact liquid supply device having few failure factors, and capable of performing a smooth push-out operation for developing uniform push-out force over the entire moving processes of a plunger, and of supplying and stopping liquid in accordance with the desired process, and to provide a drive device for the same.

The drive device may be attached to the liquid supply device comprising a syringe and a plunger so as to be used. A mechanism is used, which moves the plunger in the liquid supply device by energy accumulated in a spiral spring, and moves and stops the plunger in accordance with the desired process.