To provide a table unit for a cabin which is not projected from the ceiling of a small room located underneath even when a sofa is drawn out to be set in a bed-like condition.

When a bed and a sofa are set in a living space in a boat and the sofa is drawn out to be set in a bed-like condition, a system to detach the table from a support part where the table is set on the floor and stored in another place is troublesome. A system capable of lowering the height of the table is dangerous because support rods extended downward from the backside of the table are projected through the ceiling of the just underside small room. Taking these matters in consideration, this table is equipped with first legs to keep first height suitable for people sitting on the sofa and second legs to keep second height in which the sofa is laid in a bed forming condition onto the table.