A catheter assembly is disclosed comprising a catheter (10) and a receptacle (2) enclosing said catheter. The receptacle has a first part and a second part, which parts are foldable over each other. Further, at least one sticky adhesive area (40, 41, 42, 40') is arranged on the surface of one of the parts of the receptacle in such a way that the sticky adhesive area is covered by the other part when the receptacle is in a folded disposition, and exposed to the environment when the receptacle is in an unfolded disposition.