Film forming equipment (20) is provided with a treatment container (22), a gas supplying system for supplying the container with a treatment gas including a film forming gas, and an exhaust system for exhausting the atmosphere in the container. In the treatment container, a placing table (46) having a placing plane for placing a flat board shaped body to be treated (W) is arranged. The body to be treated on the placing table is heated by a heater (80). A clamping apparatus (56) is provided to abut/separate to and from a surface peripheral part of the body to be treated, so as to press/release the body to be treated on and from the placing table. On the placing plane of the placing table, a suction structure (92) having a recessed part (94) is formed for temporarily sucking the body to be treated by pressure difference, by forming a substantially hermetic space between the placing plane and the rear plane of the body to be treated.