To provide a driving apparatus for a greenhouse saving labor in driving a member which is the object of operation in the greenhouse.

The driving apparatus for the greenhouse comprises an actuator 10 provided with a cylinder 11 filled with a driving material changing the volume corresponding to temperature and a piston 12 sliding in the cylinder 11. The piston 12 is connected to a thermally driven arm 32 connected to the member which is the object of the operation and the cylinder 11 is fixed and arranged in a supporting frame 20. When the temperature is increased, the driving material is expanded to push out and elongate the piston 12. Thereby, the thermally driven arm 32 is rotated. A connecting arm 40 is rotated through an actuating arm 33 and a rotating shaft 31 by rotating the thermally driven arm 32. Thereby, the member which is the object of the operation is operated. The actuating arm 33 can manually be operated irrespective of the elongated state of the piston 12 by releasing the engaged state of the thermally driven arm 32 with the actuating arm 33.