To provide a partitioning bunk bed in which a user in a lower bunk is hard to hit the head or the like against a corner at the side part of an upper bunk, and work efficiency of bed making is improved.

In a partitioning bunk bed 1 for sectioning a room R into a first space R1 and a second space R2 by installing a lower bunk 10 and an upper bunk 20 which have a rectangular shape having a length longer than the width and have widthes almost the same, at the center of the room R in a manner that the length directions are oriented in the same direction, the upper bunk 10 for the second space is shifted relatively to the second space side and arranged with respect to the lower bunk 10 for the first space, a lower bunk partition 11 extending from a floor surface C to a bottom part 22 of the upper bunk 20 is provided over the entire length of the lower bunk 10, at the side part on the second space side in the lower bunk 10, and an upper bunk partition 21 extending from the bottom part 22 to a ceiling C is provided over the entire length of the upper bunk 20, at the side part on the first space side in the upper bunk 10.