A mobile dividing wall comprises at least two wall members which, for the purposes of mutually joining their border sides in a variable-angle manner, have at least partly complementary convex border profiles coated with burred material. The wall members also have complementary positioning members which mutually engage, at least when the wall members are at a specific angle to one another, in that a projection of the one positioning member enters an indentation of the other positioning member. Alternatively, the wall members have complementary positioning members which mutually exert a magnetic force of attraction, at least when the wall members are at a specific angle to one another.