The comfort device (10) includes a table (12) including a plate (22) and attachment unit (14, 16) including: a lateral fixed support (46), attached to a vertical wall (20), including a first connecting portion by sliding, an attachment member (52) secured to the plate (22), including a second connecting portion by sliding, mating the first, and unit retractable unit for blocking the attachment member on the lateral fixed support, active at the end of a predefined travel of the first connecting portion on the second connecting portion. These blocking units are movable between a blocking position in which the first and second connecting portions are secured to each other, and a release position in which the first and second connecting portions are free to move relatively to each other.