Abstract: A profile (1) to support and maintain under tension a false ceiling (2) or a false wall constituted by a sheet of plastic material having an integral border (3) forming a hook, the profiles (1) being adapted to be fixed to a ceiling or wall and comprising angle members having a flange presenting a shoulder (4) adapted to receive the border hooked thereover so as to form a throat of U-shaped cross section opening in the direction of another flange of the angle member in which throat the border (3) is to be disposed. There are two such profiles one of which comprises a male profile (1m) and the other a female profile (1f). The male and female profiles have interengaging structure thereon whereby when interengaged, the profiles form an inverted T having a vertical web adapted to be suspended from a ceiling and whose flanges with the shoulders (4) constitute a horizontal cross member supporting and maintaining in tension a false ceiling.