To provide a spiral spring mechanism and a spiral spring drive unit for enabling long time drive by combining a plurality of spiral springs.

The spiral spring mechanism 2 includes a first spiral spring and a second spiral spring which are wound up by wind-fastening force to accumulate restoring force, and a combined plate with a cylindrical rib, which has a connection part protruded on one surface so as to engage with the center part of the first spiral spring, and has an engagement part for fitting the second spiral spring to inner circumference on other surface, thereby a plurality of spiral springs are connected to be made rotatable. The plurality of spiral springs can be arranged on the same axis in a limited space, and a drive source capable of long time driving can be constituted.