A place near Gayā. It was the residence of the Yakkha Suciloma and the Buddha once stayed there (SN. p.47f; S.i.206).
The Sutta Nipāta Commentary (SNA.i.301) explains that Tankitamañca was at Gayātittha, and that it was a stone-bed (pāsānamañca) formed by a stone set on the top of four other stones.
The Samyutta Commentary (SA.i.232f) says it was either a house (geha) so-formed, or a long bed made with supports inserted under the legs of the bedstead and placed in the temples of the gods.