PROBLEM TO BE SOLVED: To solve a problem in a movable cultivation apparatus 1 of a closed-loop state that requires very long time until irrigation to all cultivation benches 10 is completed.SOLUTION: A pair of conveyors 40A,40B which are parallelly arrayed while conveyance directions of the conveyors are set in opposite directions, and a pair of guiding devices 20A,20B are arranged in a closed-loop state to allow a plurality of cultivation benches 10 to circulate. Each of the cultivation benches 10 is equipped with an irrigation tube 81 and a water filling pipe 82. The water filling pipe 82 group are connected in a communicated manner via pipe joints 83, which is configured such that irrigation is performed from the water filling pipe 82 group to each cultivation benches 10 via each irrigation tube 81. A controller 75 supplies hot water from the water filling pipe 82 group to each cultivation bench 10 via each irrigation tube 81 while temperature indicated by a temperature sensor 76 installed around movable cultivation apparatus 1 is lower than a specified value.SELECTED DRAWING: Figure 18
