Abstract: The invention relates to a changing cubicle in an aircraft (14), said changing cubicle comprising outer walls (4) that are opaque, at least in part, and being designed with an access opening (5) that can be closed, at least in part, wherein the changing cubicle (1) can be fastened to an aircraft cabin (9) by a fastening means and can be brought from a first state into a second state, wherein, in the first state, the outer walls (4) of the changing cubicle (1) are collapsed such that passengers can embark or disembark and, in the second state, passengers can change clothes. The invention further relates to a method for retrofitting an aircraft cabin (9) of an aircraft (14) with a changing cubicle (1).