To provide a barn which can take measures to cope with heat for cattle in a barn for comfortness of cattle and can improve reduction in milking amount in summer.SOLUTION: A barn comprises: a rectangular floor plane 10; a pair of side walls 14a, 14b provided on long sides of the floor plane 10; a pair of end walls 12a, 12b provided on short sides of the floor plane 10; and a roof 16 provided above the side walls 14a, 14b and the end walls 12a, 12b. The first side wall 14b of the pair of side walls comprises a pull side blower arranged in parallel, the second side wall 14a of the pair of side walls comprises a push side blower arranged in parallel. The barn further comprises: a temperature sensor for measuring in-barn temperature; a communication device for receiving an individual signal from an individual information terminal attached to cattle belonging to the barn; and a controller for controlling the rotation numbers of the blowers on the basis of the in-barn temperature and the positional information on the individual signal.SELECTED DRAWING: Figure 1
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