PROBLEM TO BE SOLVED: To solve the problem that although there are known means for opening and closing a greenhouse side face, including a configuration for opening and closing a whole side face by utilizing winding and unwinding of a mica wire and a window frame structure covered with vinyl film and the like, each means is not effective as a structure for opening and closing the side face of a greenhouse or a suction port.SOLUTION: Provided is a shutter device for suction port of each face of a greenhouse, the shutter device having a structure comprising a first to third tripled shutter plates set to a surface to be a side face of the greenhouse. In the shutter device for suction port on each face of the greenhouse, to simultaneously open/close the first to third shutter plates, the first shutter plate is opened/closed by a motor and a first crank provided to the first motor, thereby, the second and third shutter plates are synchronized with the opening/closing and opened/closed by second and third cranks which synchronize with the first crank. The shutter device is completely new and is not affected by outside air and outside air temperature, in which the first to third shutter plates formed by enlarging shutter plates (shutters) are introduced.
