An assembling arrangement serves for securing a tubular furniture leg to the top plate of a piece of furniture. The assembling arrangement comprises a through opening formed in the top plate, a top mounting, which spans the through opening on the top side of the top plate, a bottom mounting, which spans the through opening on the bottom side of the top plate and is attached to the leg, a first bore formed through the top mounting and a second bore formed through the bottom mounting in line with the first bore, a screw having a shaft extending downwards in the leg via the first bore, the through opening and the second bore, a nut for the screw shaft placed in the leg, and an anchoring mechanism for firmly anchoring the nut in the leg in the secured state of the leg. The assembling arrangement is inexpensive and strong and can advantageously be used for mounting legs upon cantilever tables and chairs.