Abstract: A driving apparatus utilizing thermal expansions and contractions including a high-temperature section (1), a low-temperature section (3) facing to the high-temperature section (1) with a certain gap of the gap section (2) there-between, a bimetal section (4) interposed between the high-temperature section (1) and the low-temperature section (3) by fixing at least a part thereof to the gap section (2), a link section (5) attached to a movable portion (4a) of the bimetal section (4) and rotary driving section (6) connected to the link section (5).