To provide a partition device of a refrigerator truck that clears the gap to a storage ceiling surface or the like; allowing easy loading and unloading; can be, in particular, manufactured and installed at low cost; keeps a partitioning member at a certain position in the storage or releases it easily with a simple structure; and can be easily additionally installed.

The device includes: a device body 2 which partitions the inside of the storage 42; and a mover for moving the device body 2. The device body 2 includes: a spindle 14 which is provided in a storage width direction in the vicinity of the ceiling of the storage 42; a supporting member 21 which swings in a vertical direction with the spindle 14 as a fulcrum; a partition curtain 23 which is hung on the side closer to the rear of a vehicle than the spindle 14 in the supporting member 21; an auxiliary partitioning member 26 which is suspended on the side closer to the front of the vehicle of the partition curtain 23 in the supporting member 21; a ceiling-surface contact member 27 which is arranged on the side closer to the front of the vehicle than the spindle 14 in the supporting member 21 and separably brought into contact with a ceiling surface 43a ; and an operation lever 31 which causes the supporting member 21 to swing in the vertical direction with the spindle 14 as the fulcrum.